Luke began his training session with Killer Bee first by a lecture. He was patiently listening even though he knew the majority training techniques especially used by marines, the Rokushiki Techniques. Judging from the nature of Killer Bee's organization, it's no surprise the he knows these exclusive skills.
Killer Bee briefly intruduced Rakougan for melee offense, Soru for land mobility, Rankyaku for long range offense, Geppo for air mobility, Kami-e for evasion, Tekkai for durability, Shigan for sub-offense and gave some examples for Luke to examine.
Luke wasn't so interested in these techniques since he has better physique himself. He wanted to jump into the real deal and asked for the concept called haki.
Killer Bee twitched his lips in annoyance. He finally noticed that the latter only has the interest in those skills.
"Well yow! I can't just waste ma' breath while telling things ya need to know and proceed to the next part. I need to see yer' progress yow!" Killer Bee immediately distanced himself ten meters away and showed a battle stance. He bent his body forward with arms wide open. He's stance is like a wrestler ready to tackle his opponent.
"Show me what ya learn fool! Don't ya go easy on me!" Killer Bee added.
"Okay chill bro. Are ya sure not to go easy on ya?" Luke also copied the latter's tone. He can't help it. This guy in front of him keeps on rapping while explaining things.
"We'll start from light then heavy once we get used to it." Killer Bee said.
"Yow! That sounds different man." Luke immediatly used Soru to dash forward. However, he instantly miscalculated his power.
Boom!
Killer Bee flinched.
A tree behind him got snapped and fell down. Just now he saw the afterimage of Luke and got shocked. He never expected Luke's devil fruit to be so good on enhancing ones' body.
"I'm good. Let's continue!" Luke appeared amidst the dust and tried again. This time he controlled his power better.
Killer Bee awaited Luke's frontal attack when Eight-Tailed Beast inside him warned, "Careful behind you!"
"Workin' on it ya fool!" He felt goosebumps behind his neck as he guessed Luke's aim.
'This fool wants me to get knocked out cold in our first clash!'
Luke raised his hand and assumed a chopping motion. When his hand was about to make contact on Bee, he felt something wasn't right.
Bam!
Killer Bee hurled forward before flipping his body mid-air and landed facing Luke ten meters away.
Luke frowned and examined his palm. His attack made contact but as if he hit something thats harder than steel.
Only then he figured something.
"Eyy yow. You cheated bro. That's haki you're using right there, wasn't it?" He complained while smirking. He knew he won in their first bout.
"Come again! You caught me off guard just now. If I knew you'd be this good, I would've prepared better." Killer Bee didn't deny the insult. Instead, his battle instinct kicked in.
He was clearly shocked by how much Luke progressed in a short period of time. Just last night the latter almost got devoured by a tiger and now he can probably face pirates with a hundred million berries of bounties.
'Damn this fool was a nobody yesterday and now he's giving me creeps!'
"Good! If I defeat you again, you need to teach me how to use haki." Luke closed his eyes in concentration. He realized that he can actually utilize his previous world's skill. He thought being in a fantasy world will overthrow his previous mindset in fighting.
'Maybe because of my power. I can adapt to anything and apply those changes to my body without any hitch.'
"Whateva'. Go on now. I won't be using haki again." Killer Bee went serious this time. He can't underestimate Luke now. No matter what, he will never admit defeat to a guy he just taught basic fighting techniques for a day. When his colleagues were to know this matter, he will be getting laughed at for sure.
Swish! Swish! Swish!
Luke zigzag his way to Killer Bee and used Shigan. His attack is as simple as it looks, but the power is enough to punch a hole on a large steel wall.
Killer Bee succesfully swiped Luke's finger attack to the side, however his speed was overpowered by the latter again.
Boom!
Luke made use of the momentum to make a spin and used a side kick on Killer Bee's ribs but got blocked by a palm.
Killer Bee frowned by how heavy Luke's attack which made him skid to a nearby tree and got stucked in it.
"Wow that was fast. This is my win right?" Luke said in a casual manner. He knew Bee is very proficient on using weapons and maybe also haki, so this match is already a great disadvantage for the latter.
Right then, he sensed a pressure behind and used soru to escape.
BOOM!!
A huge crater formed from where Luke's previous place.
"Fool, ya fool! That's only a warmup! Weeee!!" Bee appeared in the rubble while his body suddenly got coated by reddish hue while seemingly having five protruding tails behind him.
'Ohoho! Now things... are getting interesting!' Luke's eyes light up in anticipation. Now he wanted to see how many stages of tailed beast transformation can Killer Bee open up in this match. If theres a chance, he wanted to face a tailed beast bomb head on.
"Oh yeah!! Here I come!" Killer Bee then jumped upwards then slammed a tail downwards.
'This guys is breaking some rules..' Luke commented while facing the attack directly.
BOOOOM!!
...
Meanwhile, Luffy was still in the vicinity of the previous crater while tumbling in every corner trying to find the traces of Luke's trail. He was determined to see Luke and of course ask him to be his crew mate.
Garp already went back after giving Luffy a few more sermons to not be a pirate in the future, but the latter turned deaf ear about it.
"He should be here somewhere..." Luffy blindly uncovered anything thinking Luke must be hiding in one of these things, even a small rock wasn't spared.
Suddenly he halted when he heard faint booming sounds in the depths of the jungle dozens of kilometers away. Then his eyes lit up.
"I knew it! Yahahaha! I'm not so far at finding him!" Luffy happily exclaimed then started to follow the traces of the series of explosions.
...
Thirty minutes later...
Luke sat on a nearby log debris to rest. The jungle full of giant trees earlier are now cleared and many giant craters littered everywhere overlapping one another. The scene was like bombed over and over again by rounds of deadly missiles.
He didn't look so tired after clashing nonstop with Bee. He can even fight all day long but he decided to stop since their clash might cause a great commotion in the nearby kingdom. There is still Garp who surprisingly did not follow him in the depths.
"Bakayarou! Ye really are a monster! Yer' devil fruit work wonders in yo body yow!" Killer appeared on a nearby tree. He was suppressing his hard breathing, expressing that the sparring was only a good warm up.
"I got lucky I guess." Luke shrugged. He could vaguely guess his limits through this exchange.
"Hm? Someone's here. Let's hide first." Killer Bee saw a approaching shadow of a man from a distance and jumped further to the densest leaves.
Luke squinted his eyes and with his enhanced vision, he was surprised to see Luffy. His eyes shined and didn't hide as he assumed a nonchalant vibe.
"HOOOO!! HAAAA!! This place is farther than it looks! HAAAAA!!" Luffy grumbled while panting hard. After entering the sparring area of Luke and Killer Bee, he immediately got shocked.
"Woooooah!! Amazing!!"
He surveyed the surroundings with fascination written all over his face. Right then, he saw Luke in a far corner sitting on a log also watching him.
"Oyy!! Mister!" Luffy waved his hand to Luke before approaching.
"About time huh?" Luke muttered in a low voice as he awaited Luffy's arrival. Not long after, Luffy already arrived in front of him still panting, trying to catch his breath.
"What's up?- Hmm? You seem familiar. Do you live in a nearby village?" Luke asked. He was pretending that he didn't know the latter.
"Of course I live here in the forest!- Whoaa!! Mister! You have a very odd eyes! They're glowing red! How'd you do that?" Luffy got amazed the moment he focused on Luke's eyes up close.
"Hehe. This is the effect of me eating a devil fruit. Anyway, I like your friendly vibe. My name is Luke with no surname, what's yours?" Luke smiled. In the story, he also like Luffy. This goofy kid can also be dumb sometimes. But he has many good points that made everyone willingly follow him unconditionally.
When Luke read the story in his previous world, Luffy moved him three times. The first one is in the Drum Island. The second is when he battled ten thousand army in Cake Island and last is when he battled Katakuri while assuring his team he's fine. There are some special mentions but Luke liked those three moments of Luffy the most.
"Rooku?" Luffy repeated Luke's name with difficulty. He saw Luke's eyes and already tagged him as 'Red Eyes' nickname in the future. He then continued, "My name is Monkey D. Luffy! The future King of the Pirates! Nshishishi!"
"Ah! You also ate a devil fruit? Amazing! I also ate one too!" Luffy added while stretching his skin wide like a rubber.
"Oh? Your name sounds familiar. Wait- You're that marine hero's grandson. Haha! You're funny! You wanna be a pirate while your grandpa is a great hero. I like your courage man." Luke chuckled. He truly found it laughable hearing Luffy's dream face to face.
"That's true! I will surely become the King of the Pirates one day! That's my greatest goal!" Luffy didn't mind Luke's confusion. He recalled the times he made a promise with Shanks.
"Alright. Have it your way. I also have a dream. A dream that's even more impossible to achieve than yours." Luke shrugged while smiling. He asked, "Anyway, what are you doing here? This place is dangerous."
Luffy got confused. A dream that's even more impossible to achieve than his. What kind of dream was that anyways?
After contemplating for a while, his expression went sour. His face truly plastered a big question mark. He even ignored Luke's question.
"Luffy, you gotta leave this place. The commotion here may attract various wild beasts nearby." Luke reminded again.
Luffy woke up from his daydream and almost forgot his goal for coming to the place.
"Oh right! I was looking for a guy with sunglasses and his body was covered by a white clothe all over."
"Hmm?" Luke frowned and somehow felt odd. Luffy's description matches his outfit earlier. He scanned the surroundings and fortunately he found his things.
After grabbing his sunglasses, he then wore it slowly while covering his body with a clothe.
"You mean this guy?" He then pointed at himself while asking Luffy with a smile.
"Yes! Yes! This guy! Do you know where he went? I want to ask him something." Luffy eagerly asked, unaware of the current situation.
Luke's lips twich. He didn't know wether to laugh or cry. The hint is already in front of Luffy and the clueless guy still could not figure things out.
"Hey silly. I'm the one you're looking for." He just could not do it. The guy in front of him is too pure hearted.
"Huh?" Only then a thought entered Luffy's mind. He exclaimed, "EHHH!! R-Rooku! You are him?!"
"Can't you tell?"
"No, actually. I also think you're disguising as him."
Luke got defeated by their little argument. He decided to let things go and asked, "So, here I am. What do you want from me?"
"Oh! OHHH! Yeah I almost forgot!" Luffy excitedly hopped over and continued, "Rooku! I want to invite you as my crewmate!"
"Huh? Me?" Luke pretended to ask. Being a part of Straw Hat Crew is one of his goal. But seeing Luffy asking him like this, he couldn't help but feel gratified.
"Yes! You and I will sail to the seas and achieve the One Piece together! Hehehe!" Luffy smiled happily that even Luke got moved by this simply innocent guy.
Luke stared at Luffy a couple of seconds while having some flashes of memories from his previous world.
He removed his sunglasses and cloak and faced Luffy who awaits his response. He then smiled and said a simple but deep in tone.
"Sure."