Summary: Originally was titled, 'Dragons and Heroes: Legacy'. When the strongest hero alive gets thrown into the world with supernatural entities, his son got caught in it and gained lively companions. Would it be possible for his son to inherit his power as well? As the hero started another quest to find out the origin of his power. WARNING: OOC! Possible AU in later arcs.
Link: https://m.fanfiction.net/s/11177108/1/One-Punch-DxD-Legacy
Word count:760k
Chapters:62
Prologue
That was supposed to be just another day for Saitama. Any other day where he woke up, got into a fight or any crisis that involves villains, humanity and doomsday, end it with a punch (or maybe more, depending on how strong the enemies are), go back home and wash his gloves, as well to receive either zero gratitude or even accusations of him being a cheater. Honestly, all he had ever done is using his power to save the day and almost no one believes him. Not that he can blame them, but people everyone can at least believe his method of training. But still, he cannot blame them. That day, Saitama and his so-called cyborg apprentice, Genos, were engaging another smart-ass lunatic that built a machine that according to him, can generate a portal to different dimension and he might as well planned to unleash whatever the hell was sleeping within. Subduing the lunatic and his lackeys were easy enough, but deactivating the already activated machine is the tough part. While Genos was trying to deactivating the machine manually, Saitama just had to decide to just punch the machine away into oblivion. The result was, due to malfunction a black hole was generated and it sucks everything unfortunate and close enough into the darkness. Saitama who destroyed the machine first-handed of course was the first one to be pulled in.
"SENSEI!" shouted Genos as he quickly grabbed into some structures that seemed can hold long enough. And his other arm reached out just to be able to grab Saitama's hand in a nick of time.
Saitama was relieved that his companion managed to grab him as he saw the 'lunatic' as well as his lackeys were screaming in terror as their bodies disappeared into the hole. "Whoa, you saved me, man!" said Saitama as he let out a sigh of relief. "Don't let go, 'right?!"
"Hnngghh….!" Genos grunted as he tried to pull Saitama towards him, using his strength to fight against the air current. "Hang in there… Sensei… Just a bit more….!" Said Genos as he kept pulling, but the force from the black hole was really strong due to how close the distance the two heroes with the hole.
Saitama's eyes widened as he saw that the structures Genos was holding on could not hold their ground and would soon crumbled, then after contemplating few seconds, the bald hero let out a small smile for a moment then he said, "Um… Y'know what? I guess you can let go, now" with laid-back tone.
"What!? What are you saying!? I'm not letting you go!" said Genos with desperate tone. But at the same time, he could not deny that the structures he held on couldn't last longer and the black hole before them would not disappear any sooner.
"Cut the melodrama, Genos" said Saitama with straight face. "This is not some romance where a couple were desperately clinging on their lives. Well, we WERE clinging for our lives now, but still!" said Saitama as his faced hardened, "You've gotta lemme go or we'd both die! You know what's the best choice!"
"But I still want to have more missions with you… And I still want to learn more from you…." Genos said as he realised the fact. He had to let go or he will also sucked into the black hole. "You saved me countless times, you even put up with my selfishness and my quest of vengeance! I haven't repaid you yet!"
Genos was truly indebted to Saitama. At first he wanted to learn the origin of Saitama unmatched strength so he can be strong enough to defeat the crazy cyborg that took everything away from him in his past, but his self-proclaim teacher not only willing to take him in, he also taught him many things, but he also helped him quell his hatred. Truthfully, after Genos was finished with his quest of vengeance, or rather his hatred and his past, the cyborg doesn't care anymore about Saitama's power origin. Even if he still wanted to be stronger, it was for the sake of becoming a hero like Saitama. If he was still fully human, Genos would be crying right now.
"Geez, you're really too serious for you own good…" said Saitama as he snickered. "You don't need to learn anymore. Hell, you're not even my disciple to begin with!" Saitama declared as he slammed his fist onto Genos' arm that was holding him.
Genos' eyes widened as his arm got crushed into pieces from Saitama's hit. He wanted to use his remaining arm to grab Saitama again, but his reasoning got the better of him. Genos only gapped with a face filled with shock, fear, and slight betrayal as he saw his teacher got further away into the black hole. "I'll leave things in your care now, BUDDY!" was Saitama's parting words as he smiled and put gesture of someone saying goodbye.
Few seconds after Saitama had disappeared into the darkness, the hole disappeared as well. Leaving the cyborg on the rubbles as his body fell on knees. "SAITAMAA!" Genos' voice was heard loud that day.
Dark… That was Saitama's first thought as the portal connecting him and the world got closed before him. The man tried to move, but he could not feel anything at all since his inside a vacuum space. Saitama also realised that there was no air to breath either. It seemed that holding breath could do the trick for now, but Saitama was aware as well that he could not keep this up forever. He had to do something quick before he died from suffocation.
If he could actually die from suffocation, that is.
''Shit… I really can't go where I want to…'' thought Saitama as his body kept floating mindlessly in the space.
He could not feel that his legs and hands, touched or made any contact with anything, and by the manner of his body floating, he assumed there was no air for him to breath whatsoever as well. It had been already quite some time since he got sucked into the oblivion. Saitama still remained floating in the void space while holding his breath. While he had quite confidence to be able to survive without air to breath for some time longer, Saitama still believed that a fresh air would be highly appreciated – not able to breath sucked balls.
Breathless, not able to move, Saitama was finally overwhelmed by dreadful boredom. "Maybe I should just go to sleep, but I can't sleep peacefully if I can't breath… can I?" Saitama thought as he did not really understand about the mechanism between void space and human body. He was never academic type to begin with.
However, when Saitama decided to go 'fuck it' and did…. Something utterly foolish (probably, most likely), suddenly a sense of comfort washed over him. It was… oddly comfortable, like Saitama was placed on the softest bed he had ever felt. Not that he was tired or anything, but when he was enveloped in such comfy warmth… he automatically closed his eyes in content. He had been wanting to sleep for some time, after all. Sleep came first, he could think whatever was happening later after he had awoken.
In addition, not that he cared that much, but there was also air for him to breath with.
The last thing he recalled before falling into blissful sleep was a large glowing balls that resembles a pair of yellow reptilian eyes, belong to a giant figure looming over him. The last things he heard before he finally succumbed into unconsciousness were,
"It's been a while…"
"…Never thought you're gonna showed up…"
"… entertain me more…"
"…do something about that little prick of infinity…"
"Wha… What?" thought Saitama as he finally passed out. "Meh… Whatever. Time for bed."
Saitama was walking on an empty street at a local suburban area. As he walked through the night, the bald hero tried to run over things that had happened to him. From what he had gathered, after all those fiasco about black hole, space and mysterious giant figure that probably saved him from…. What he thought as the most boring situation and location in his life, that he thought could have actually killed him.
Saitama was found asleep on a random dumpster by a police whom was patrolling that area. After few questionings, small interrogations about his appearance and tattered weird outfit, etc., Saitama was fortunate enough to be able to sneak away from the police station without much problem. Saitama figured from the map inside the station that he is still in Japan, but not his Japan. There were no city Z, Y, or whatever city with alphabetic in this country. There was no Hero Association, in fact, the policemen from before thought it was some kind of cosplay convention or some other strange cult or group or something. Another thing was that his name was not on any registry. This led him to escape from the police station or he would have been put in jail or had to go through with some protocol bullshit that irritated him.
Currently, he was looking for a place to sleep for the night, as he still felt… kind of lethargic from the earlier sleep – he did not actually want to get up from that kind of sleep for a while.
He found a local park and decided to sleep on a bench there, sleeping outdoors did not really appeal him, but the weather was pretty nice and the cold of the night wind did not bother him at all. Saitama approached the bench and he laid on it then he relaxed his body.
"Still… That giant figure earlier… What was that?" thought Saitama as he stared at the night sky.
From his memory, he could tell that the giant figure was definitely not a human, and was insanely powerful. Saitama bet that giant figure could actually give him a real challenge. Thinking someone (or something) that was at least on par with him make him excited for some reasons.
"But that why was its power so familiar…?" Saitama remembered the sensation that kept him alive in that space. "And he said 'it's been a while'…. Does it mean that we met each other before?" Saitama could not recall that he ever met such a being before.
Can it be something that had fought him in the past? Did he meet him again for revenge? Not likely, since if so, he could have just left him floating aimlessly in space for who knows how long, or just attacked him right there. Whoever or whatever that figure was, Saitama concluded that the being could give him some answers. "Well, whatever. Let's just sleep for now…." Thought Saitama as he let himself fall into the dream world until…
"KYAAAAH!" a scream was heard echoed through the park.
Not being able to ignore his heroic instinct, Saitama quickly ran into the source of the scream. Upon arriving at the source, Saitama found a scene where there were a young woman, frightened, dropped on the ground facing a giant monster that resembled a deformed giant ogre, or orc, or whatever creature from the horror movie he used to watch back then. The said creature stood around 5 meters tall and it wielded a giant club ready to smash the frightened woman to bits. Seeing her incoming doom, the woman closed her eyes accepting her fate.
BAAM! CRACK!
Only to feel that the hit did not come at her at all, instead it was replaced by the sounds of earth cracking beneath her and something hard clashed against the giant club. The woman opened his eyes slowly to see a figure of a man looming over her. His right hand was holding off the creature's giant club while both of his legs were slightly buried into the ground, causing several cracks and lines on it. But nonetheless, the man protecting her was standing firm and not harmed at all.
"Uh, you alright? Did you get hurt anywhere?" said the man looked over his shoulder.
"Ye… yes" said the woman not believing the sight before her. A single, average-looking man, not to mention his bald head did not help his appearance at all, stopped a giant club of a creature several times his size without breaking a sweat. And how is his face remained calm like that? Isn't he supposed to be a bit more panicked? Those were the thoughts of the woman who stared in both shock and amazement.
"I guess even in this world, I still need to play hero…" thought Saitama as he stared at the creature before him.
"Hmm? Another human? And you seemed strong… I guess the stronger would taste better… And two humans will taste even better!" said the creature with rough voice as he lifted his club once again to deliver another killing blow.
WHAM! CRASH!
The said creature did not have another moment as his body was obliterated immediately right after Saitama landed a hit on him. "Cut it out, will ya? I just want to sleep already, to be honest…." Said Saitama in reluctant tone. Indeed he felt that his fight ended up boring as usual, but he really can use a good night sleep right now. But before so…
"Um… Can you stand?" asked Saitama as he turned around at the woman who had her mouth gapped by such display. The woman could not believe that the man before her just defeat such monstrosity with one punch, and he did that effortlessly, as if he was just swatting a bug.
"Um… Hello? Miss? Can you stand up on your own?" asked Saitama again with worried look as he waved his hand in front of the woman's face.
"Huh? Eh? Ah… Yes, I'm fine. Thank you…" said the woman as she stood up. "What was that thing?" asked the woman as she took a quick look at the remnants of the creature.
"Who knows? Might be just some random monsters that preys upon people at night." said Saitama with a shrug as he took another glance at the woman he saved. In his home, monsters like this are daily occurrence.
To be honest, Saitama was a bit impressed. This woman is tougher than she looks. Most people would have passed out or scared shitless from fear when faced by such creature. Yet this woman quickly recovered after being terrified by a monster. Not to mention, now that Saitama had a better look on the woman, Saitama must admit that the woman is quite a good-looking. Her brown-hair was tied into pony tail and she looked quite modest as well.
"Focus, focus…" thought Saitama as he shook his head a bit. "Can you walk home by your own?" it was quite rare that Saitama ever offer such hospitality towards a person he had saved before, since he usually just walked in, punch and walked out. But after seeing a woman before him, Saitama himself had no idea what has made him to do such a thing.
"Yes, I can get home by myself. My house is just around that corner. Thank you for saving my life…" said the woman smiling as her face blushed a little. Saitama quickly averted his gaze somewhere else.
"Well then… If you say so, I guess I'll take my leave now… " said Saitama with a yawn as he walked off.
"Wait!" shouted the woman stopping Saitama on his track, looking at her over his shoulder. "Who are you?" asked the woman in wonder.
"Just your average hero who got lost, that's all. Good night, then…" said Saitama nonchalantly as he walked off again. But he stopped on his tracks again when he felt someone tugged on his tattered cape. He looked over and found the woman was gripping his cape.
"If you don't mind… You can stay in my house for tonight…" said the woman as her blushed brightened slightly, her eyes was covered by the bangs of her brown hair.
"Eh?"
"It's the least I can do in return after you saved me…" said the woman as she averted her gaze to the side.
"No, no thanks. I can manage by myself…" replied Saitama as he tried to let go the woman's grip.
"Well, no offense here, but you looked like you don't have any place to stay. You look like a total bum with that get-up…" said the woman eyeing Saitama's appearance. "Also, you said that you just want to sleep earlier, which means that you were quite exhausted despite being strong enough to beat that monster with a single punch. Don't you think a nice warm bed under a roof would be a suitable place to rest for the night?" said the woman with a smile trying to persuade her hero.
"Well… It's true, but…"
"No buts! A gentleman should not refuse a lady's offer into her house! Especially if the gentleman had saved the lady from peril! It's not time to be modest now!" cut the woman with stern tone.
"…(sigh)… if you say so, then… Don't mind if I do…" said Saitama in acceptance.
"Good, now let's go. It's getting very late", said the woman as she grabbed Saitama's hand and pulling him to her house. "Hold on", said the woman stopping after she took few steps. "May I know the name of my guest tonight?" asked the woman as she held on Saitama's hand.
Saitama found out that despite still using his gloves, the woman's grip was very warm for many reasons. "It's Saitama…" said the man as he snapped out from his private moment.
"Just Saitama? I want your full name if you don't mind", asked the woman again as she put her face closer towards Saitama's.
Saitama flinched slightly. He just realised that he only ever introduced his first name to other people, not even Genos. Where had been his manners all this time? After contemplating for a while, Saitama decided it will not hurt to give the woman a proper introduction, considering that this world's system has not recognise him. He smiled and responded the woman's grip as he grip back her hand gently, "It's Hyoudou. Hyoudou Saitama at your service".
(Time skip – many years later)
It was early in the morning when a 17 year-old boy with brown hair woke up from his bed. After rubbing his eyes for a while, he let out a yawn as he stretched himself, got out from the bed, and he opened the curtain of his room's window. Seeing that the sun has not clearly risen up yet, the boy decided he can start his daily morning exercise.
"Okay… Now let's do this again…" said Issei with determination as he had put on his track-suit and headed out of the house.
[Morning, partner] a voice said greeting him.
"Ah, g'morning, Ddraig. Let's do our best today again, shall we?" replied Issei as he looked at his left arm.
His daily exercise contains 50 times push-ups, 50 times sit-ups, 50 times squats and 5 km running, and trained with his, as the heavenly dragon had explained him around 5 years ago, the boosted gear until the time his mother wakes up and had prepared breakfast for him. Note that he has been doing this ever since he was 10. And the training with his boosted gear was added by himself after he found out about the dragon few years after his training started. It was all started after he, Hyoudou Issei, had spent his childhood without knowing his father that he finally asked his mother about his father's whereabouts.
oXo
(Flashback)
"Mom, mom..." asked a 10 year-old Issei as he ran towards his mother in the kitchen.
"Yes, Ise?" replied his mother softly as she had just finished with the dishes.
"Why don't I see daddy around? Do I even have one?"
His mother only silenced for a few moments and she simply walked to the dining table to set up plates for dinner. "Of course you have a daddy, silly. It's just that… He travels a lot… And he probably not coming home, at least not anytime soon…" said his mother with a sad tone.
"Why's he going away, then? Where'd he go?" asked Issei as he sat on the table.
"He's just saying goodbye all of a sudden after coming back from work one day, and he disappeared… Just like that" Issei's mother replied closing her eyes in reminiscence.
"Does daddy…. Not love us anymore?" asked Issei as he gazed downwards with sad expression.
"No, no… sweetheart… Daddy still cares about us. He sends money occasionally so we can sustain ourselves, you know?" Issei's mother said to comfort her son.
"Then why did he have to go? Why did he leave us by ourselves?" asked Issei with more intrigued tone.
"I… I don't know, sweetie… One thing I know from your father is, that your father can be a very selfish and unpredictable person. I didn't know what he's thinking that time and I still don't know until now" said Issei's mother as her eyes gazing into a blank space.
"Then why did you marry dad?" asked Issei tilting his head.
"It was probably love at the first sight, Ise… Ever since that night when your father saved my life…" said Issei's mother smiling at the memory.
"What? Dad saved your life?" asked Issei with surprised look.
"Yes… Back there, your father was very cool… Like a superhero. And I think he is the strongest man alive I've ever seen…" said Mrs. Hyoudou as she put one hand on her blushing cheek. "But he always caused me so much trouble, even after you came to our life, Ise…" Issei only nodded slowly, sinking his mother's thoughts about his father into his head. For his mother acting like that, he could not help but to believe that his father is not only an enigma to him, but also a very strong one. And being a hero? He had to admit it might sounds cool to have a hero as your father.
"Anyway" her eyes looked at her son again, "Remember Ise, when you'd grown up, make sure you'll become a man who won't make a girl cry, become a man who prioritize a girl's happiness, okay?" Her son only nodded resolutely in reply.
Mrs. Hyoudou still remembered the day her husband gone leaving her and their 2 year-old Issei by themselves. She could not help but crying that night, while she knows that her husband has a good reason for what he did, but she could not understand why. But until now, she still believes that her husband will return home someday as she looked at their family picture inside the cabinet. In the picture, both parents in casual clothes with Saitama happily carrying a baby Issei in his arms.
"I've decided, mom", her son's words snapped her out of her reminiscence. Mrs. Hyoudou looked at her son who had a determination in his eyes.
"I want to be stronger, so I can bring dad home. Even if I have to drag him along the way!" said Issei clenching his fists.
At her son's declaration, Mrs. Hyoudou eyes widened for a second. Until she could not help but snorted in giggle, remembering another thing when her husband decided to take his long-time journey.
(Before Saitama left home)
"Ah, one more thing, honey. About our son…" Saitama turned back to his wife. His wife wondered what Saitama wanted to say.
"I got a… feeling, some kind of. That when he learns about… This…" said Saitama gesturing their current situation. "He's probably gonna looking for me. So…" Saitama said as he handed an unsealed envelope. "I want you to give this to him. Inside there are instructions what he needs to do if he wants to meet me" said Saitama as his wife studying the content. His wife's eyebrows creased slightly.
"Why… Why would Ise need to do this? I don't understand…" asked Mrs. Hyoudou as she put the content back into the envelope.
"Trust me, honey. It's just that… I got a hunch that when our kid decides to look for me, it's gonna be a hard path. I don't know how long would he take, but I want at least for him to be prepared…" replied Saitama with slight uncertainty in his voice. "But now that's what I believe in. I felt a potential inside him, so I've decided all this" said Saitama with resolve.
"How can you be so sure about this? Especially about our son?" asked his wife as she held the envelope close to her chest.
"What else do you think? It's our son we're talking about, right?" replied Saitama with a confident smirk.
(Back to current flashback)
"How right you are, dear… Look at our son… He really wants to see you now…" thought Mrs. Hyoudou as she finished giggling.
"Um… Mom? What's funny?" asked Issei seeing his mother giggled all of a sudden.
"Nothing, sweetie… I just remembered something. Wait here." Said Issei's mother as she walked up to one of the drawers, and she took out an envelope, the very envelope her husband left behind before his departure. And she gave it to her son, which he accepted reluctantly.
"Ise…" said Mrs. Hyoudou with stern tone. "Your father had seen this coming, thus he left this for you if you ever wanted to see him. Read this carefully, and whether you can do this or not depends on your resolve. Do you understand?" asked Mrs. Hyoudou to his son. I
ssei only looked at his mother then to the envelope. After thinking for a while, Issei tightened his hold on the envelope as he looked up to his mother with resolution in his eyes. "Yes! I'm gonna be stronger so I can drag dad back home!"
Issei's mother only smiled at this. "One more thing Ise…." said Mrs. Hyoudou as she went back on her seat and she placed her chin on both hands. "Hm?" Issei looked up again before he left the dining room. "When you met your father, can you give him a punch for your mother?" asked Mrs. Hyoudou with a sweet smile. Kind of too sweet, in fact.
"You bet 'cha!" replied Issei enthusiastically as he ran up to his room.
Seeing off her son, Mrs. Hyoudou let out a sigh as she stared at the ceiling. "You better get yourself prepared, dear…. Fu fu fu…" She thought as her smiled widened again.
(End of Flashback)
While Issei was finished up with his squats, his mother was peeking from the window of her room without his knowledge. Seeing her son had finished some parts of his daily training, she smiled as she saw her son ran off out of the house to finish his 5 km run (note that of course Mrs. Hyoudou has no idea about Issei's boosted gear). "How I wish you can see this, dear…" she thought as she walked away to prepare breakfast.
Meanwhile, with Issei running through the neighbourhood, he could not help but to remember his father's letter to him. The letter contains his training regimen and few notes at the end. Issei was well aware that even after all the trainings those past years. Issei still craved for more power, as his instinct keep telling him that his current strength is still nowhere near his father. If he could not beat his father, his father may not want to go home. So he decided to make himself stronger until he is strong and matured enough to take on whatever heading on his way. However, the end note in his letter somehow bugs him.
'P.S. While you're doing all this training, make sure to take good care of your hair. (y)'
That particular sentence worries him a bit for some reasons he could not fathom. "What does that mean?" thought Issei as he kept running.
[Uh… Why don't you take a look at your old man's appearance again?] said Ddraing voicing his opinion. His voice somewhat showed a slight worry as well.
After contemplating of what Ddraig said for a while, Issei stopped on his track. He rummaged through his hair as more sweats pouring down his face. "Okay… It's still there…" thought Issei until he chuckled in both relief and nervousness after remembering his father's bald head. He snapped out of his stupor as he started running again, trying to get rid of uneasiness about his head. What had happened to his father's head is not going to happen to him right? … Right?
To be Continued...
Link: https://m.fanfiction.net/s/11177108/1/One-Punch-DxD-Legacy