In a cave inside a deep abyss, a boy was walking and bleeding. It was a white-haired boy who seems scared.

Boy: (Scared) Shit! Why is this happening to me? What did I do to be in this situation?

The boy was walking, then he saw his arm was very injured, also his chest and left leg.

Suddenly a monster appeared in front of him. It was a lion type with huge fangs.

Boy: (Scared) Why? Why is it after me?

The monster attack him, he tried to defend with a little blade which resembles a kunai.

Some hours before…

It's seen a city with people who are doing normal things.

Boy's voice: My name is Kurobe Akatsuki. I'm just an average boy who is assisting in this academy.

Kurobe was walking until he reached an academy. Then in a class, he was with other students.

Kurobe's voice: In this year, the world was being invaded by monsters, demons, beast races and other. The humanity has to learn how to defend. During many years; we were at war, but humans had no advantages. but we had the support of something, a divine presence which is called Lord God. Its voice reached us and he told us what we should do to counterattack the enemies. It said that the demon Lord, Satan, sent his troops to make chaos in our world. So an entity was founded, the Holy Church that was directed by the Lord God. The priests chose humans with great abilities to be trained to fight demons and monsters. (Imagining what he said)

Kurobe saw some classmates talking.

Kurobe's voice: We, in this academy, are instructed by the Holy Church, to become heroes and defeat Satan. One of us should become the leader and lead the heroes and end this war.

He saw a student with a group.

Kurobe's voice: That's Hayato Fujimura, the boy with the highest level of power and magic. He is the candidate to be the Hero that will lead to victory. All the rest of us follow him. I always looked at him as an inspiration, to be part of the group of heroes. But the truth, my level of power and magic is the lowest in the academy.

Later in a training camp, students are seen in sports clothes, training their skills, some with magic and others with combat with weapons. Kurobe was fighting using the small dagger and was fighting with another student. That one seemed to humiliate him until he almost knocked out and injured Kurobe.

Student: (mocking) Hey! What's up Akatsuki? You will never level up if you don't fight seriously.

Kurobe: I'm sorry, Yamazaki, but I'm still not used to fighting with weapons.

Student 1: Look at it Iori Yamazaki, that white haired boy couldn't even take you down.

Student 2: How pathetic!

Iori: (Mocking) Yes. he shouldn't be part of the hero group!

Kurobe: (Laughing a little) Hehehe! Yes, I need to train more.

Iori: Even if you trained all your life, you wouldn't reach me!

Kurobe: (A little sad) Hey! Maybe.

At that moment, a violet long hair girl approached them. Carrying a bottle of water.

Girl: (Smiling) Hello!

Iori: (Happy) Hello, Sakurada! You came to help me after the training… (extending his hand to her) Thanks I'm thirsty…

The girl just walked past him, heading towards Kurobe who was exhausted.

Girl: (Passing the water bottle to him) Here, Akatsuki-kun! You must be very exhausted after training.

Kurobe: (A little worried) Thank you, Sakurada. But I'm fine...

Girl: No! You must not exceed your limit, we all train equally.

Kurobe: Well thank you. (Thinking) "She is Akane Sakurada, a student of a high level of magic, like a priest. She is very popular in the whole academy, and besides being very kind and beautiful. The girl that every boy would love."

Iori was angry seeing them together, he just ignored them and left with his companions.

Akane: (Handing him a towel) Here, you need to rest.

Kurobe: Thanks for being kind, Sakurada.

At that moment, a group of 3 students approached them. One with short brown hair, was Hayato. The other is a black hair boy and a black hair girl with ponytail.

Hayato: (A little annoyed) Hey! Akatsuki, stop wasting time and keep training!

Kurobe: Sorry, I just...

Hayato: Also, you shouldn't take advantage of Akane's kindness! She also has her affairs...

Akane: Hayato, that's enough. (Smiling) I do this with Akatsuki-kun because I want to do it.

Hayato: (A little nervous) Really? Well, I guess that's okay. You are always kind to everyone. Right? Kentarō and Mai.

Kentaro: Calm down Hayato, or Akane will start to hate you.

Mai: Come on, we've known Akane since childhood so let's try to get along.

Kurobe: (Thinking) "The others are Mai Amakusa and Kentaro Okamura, together with Sakurada, they are Fujimura's childhood friends. Sakurada is always kind to everyone, but a weak boy like me couldn't be with her. Many say that Fujimura and Sakurada love each other even they look like a couple, so I wouldn't have a chance with her"

Hayato: Anyway, we must train to defeat Satan's demons! So we must try harder every day. Especially you, Akatsuki, you can't depend on someone to take care of you!

Kurobe: Yes, excuse me.

Akane: Don't be strict with him, Hayato! Just because Akatsuki-kun' power is very weak, it's not his fault that he doesn't have your or the others' level...

Akane realized that Kurobe was in deep depression hearing that.

Akane: Akatsuki-kun, I'm sorry! I did not want to say that...

Kurobe: (in his state) I'm fine, leave me alone for a while.

Kurobe withdrew, leaving the group. Akane was worried at the moment.

Later in another field; Kurobe was practicing with his dagger, trying to cut a thick stick as a target. But he always misses and fails to cut it. He would sometimes drop his dagger or cut his hand a bit. He felt sad and angry.

Kurobe: Shit! Why can't I cut? I'm not stronger! (hitting the ground) Damn! Why? Why? Why? I have to be stronger to support the heroes, I can't keep being a hindrance to them!

He didn't notice someone was watching him. That was Akane.

Later at night in academy rooms, Kurobe, who was depressed, was checking his dagger, also check a photo. There was a family, a white hair father, a blue hair mother, a white hair boy and a white hair baby the mother was holding.

Kurobe: I can't be the same forever, if I don't improve my skills, I'll end up like my family. (Imagining his kid-self injured, he was in a road accident, seeing his parents' corpses and an empty cradle) I can't be the same!

Then someone knocked the door. He realized it was Akane who was worried.

Kurobe: Sakurada?

Akane: Akatsuki-kun, I'm sorry for saying that to you.

Kurobe: It doesn't matter, I try to make my effort, even it means nothing to everyone. Why did you come?

Akane: Akatsuki-kun, I had a bad dream. We'll have a difficult battle, maybe one of us will die. You're with high risk.

Kurobe: What?

Akane: That's why, you shouldn't come to the training in a dungeon. I won't be able to see you injured mortally.

Kurobe: So that's it. You're a priest, you could have a vision.

Akane: Akatsuki-kun, that's why…

Kurobe: I'll go anyway.

Akane: But, aren't you afraid?

Kurobe: I'm afraid but… I have to. Or else everyone will see me as a burden. I have to show them I can fight even I'm a low level heroe.

Akane: Akatsuki-kun… I…

Kurobe: That's why I have to go! If something happen to me, will you heal me with your powers?

Akane: Akatsuki-kun, yes, I'll promise I'll save if you are in danger.

At next day; Kurobe and the party were in a dungeon.

Captain: Listen everyone, you're going to train a real battle with some monsters in this dungeon. We checked this cave has standard level monsters. Be careful in this training. It's time to improve your skills to face Satan's army. (To Hayato) Hayato, lead the party!

Hayato: Yes, captain Kurosaki! (To the party) Everyone, let's go!

The heroes ahead in the dungeon. Kurobe seems little afraid but trying to be brave as holding his dagger.

Then a group of monsters like goblins appeared, surrounding them.

Hayate: There they are! Everyone, be ready to fight!

Some of the heroes were fighting using weapons. Like Hayato with his sword, Kentaro with his giant axe and Mai with her katana. Iori also fights with a lance. Other were using magic to shot, Akane was using magic to increase power and defend her friends.

Kurobe: (As fighting) Agh! Why they are strong? I have to be able to kill unless one!

A goblin attacked Kurobe and was knocked down very easy. The goblin was ready to kill him but then that goblin was slashed, killing it. Hayato saved Kurobe.

Kurobe: Thanks, Fujimura.

Iori: Hahahaha! Akatsuki was defeated by a low level monster! What a pathetic!

Akane: Akatsuki-kun, are you okey?

Kurobe: Yes, sorry.

Iori was angry to see them together.

Hayato: Akatsuki, you should become better, you're slowing us!

Mai: That's enough Hayato!

Hayato: I'm the hero leader, it's my duty to keep my party safe! But all of you have to your part in this mission!

Captain Kurosaki: You're right Hayato, everyone let's move.

Iori: Damn! Why Akane is more friendly with Akatsuki? (Then he stepped in a symbol on the ground) What is it?

Suddenly a huge magic circle shined and covered all of them.

Captain Kurosaki: Oh no! This magic circle is… Everyone run…

Then all of them were transported into another dungeon.

Hayato: What was that? A transportation magic?

Mai: We were sent to another cave!

Kurobe saw someone in the shadows, a female entity.

Mysterious girl: Oh? It looks like the Holly Church didn't train well these kids. Can't they detect magic transportation? All of you were summoned in my demon base in the abyss.

Mai: We are in a demon base?

Hayato: Who are you?

Mysterious girl: I'm one of Satan-sama's generals! I don't have time to waste in trash like you, so I'll let my army feed from you! Go!

Then a group of monsters appeared and went to them.

Captain Kurosaki: These are high level monsters! You're not ready to fight them! Let's escape!

The heroes were running away as the monster went after them.

Mysterious girl: Run as you can, if you can escape by the bridge. Hahahahaha!

The heroes kept running away until they reach big door. They passed and there was a huge rock bridge.

Captain Kurosaki: We must cross the bridge, I sense another magic transportation, we'll be out of this abyss! Run.

Suddenly more monsters like living skeletons, goblins and beasts appeared from other directions.

Hayato: We have to defeat those monsters in order to escape!

The heroes fought against the monsters with difficult. Kurobe is trying to fight too but only by dodging.

Captain Kurosaki: Don't defeat them! Just knock them to open road!

A girl was fighting a beast but that pushed her down. It was nearly to kill her, but then Kurobe arrived and pushed the beast making it fall from the bridge.

Kurobe: Are you okey, Tachibana? (Little blushed) Eh? (Looking to other side)

Girl: Yes… eh?

She realized was sat with her legs opened, showing her panties under her skirt. She covered her skirt with embarrassed mood.

Girl: Akatsuki-kun… did you?

Kurobe: There's no time! Wake up and move. I'll go with the others.

He leaves the girl, and go to other place. Akane was using defense magic but a living skull attacked her by behind. She was little injured but the captain Kurosaki saved her by killing that living skull.

Captain kurosaki: Are you okey, Sakurada?

Akane: Yes, thanks captain Kurosaki.

Captain Kurosaki: There more coming, we must stop them!

Then Kurobe arrived and closed the gate, then used some boulders to block the gate.

Captain Kurosaki: Kid!

Kurobe: Captain Kurosaki, take Sakurada.

Captain Kurosaki: And what about you?

Kurobe: I'll try to slow them down as you escape through the bridge!

Captain Kurosaki: It's too dangerous for you alone! We won't wait for you! We'll destroy the bridge!

Kurobe: Just go! I want to be useful unless for this time!

Akane: (Worried) Akatsuki-kun, no, don't do it!

The other monsters strike the gate trying to pass. Kurobe is blocking the access with his body.

Kurobe: Go now! Hurry!

Captain Kurosaki: (As carrying Akane) Fine! Hold on, kid. We'll support your escape at the bridge. Everyone, move!

The heroes defeated some monsters and run through the bridge. They arrived to the other side.

Captain Kurosaki: Guys, prepare to shoot the monsters when they come and destroy the bridge! (To Kurobe) Hey kid! Run!

Kurobe moved away the gate and run as fast he can. The other monster army crossed the gate and went after Kurobe.

Captain Kurosaki: Ready? Shoot!

Some heroes used magic to shoot with fireballs. Kurobe was running as some monsters were blast by the fireballs. Also the bridge was cracking.

Kurobe: Wait for me, guys… (Noticing a fireball was heading to him) What?

The fireball injured his left leg, making him fall.

Captain Kurosaki: What happened? Why one attacked him? What went wrong? Kid, stand up! The monster are still coming!

Akane: (Worried) Akatsuki-kun! Hurry!

Kurobe: (Very scared) No! No! No! Wait for me! Guys! Don't leave me! I don't want to…

Suddenly a living skeleton pierced Kurobe with a blade behind him through his chest side. Akane and the others were in shock to see that.

Kurobe: (In shock and bleeding) No! I don't… want to die… like this…

Then the bridge was collapsing, the monsters were falling. Kurobe was falling as bleeding. He extended his hand to his party but was in vain. Akane was in shock as seeing Kurobe falling to the abyss.

In the deepest abyss, Kurobe fell on what looked like a black river. He was weak as he was dragged down the river.

Kurobe: Why is this happening to me? What did I do? Is it because I'm weak? Is it because I was born? I am too weak to continue.

Then he heard a distant voice, it seemed the voice of a girl screaming.

Girl's voice: Akatsuki-kun!

Kurobe: Why? I lost my family (Imagining his parents death), I lost my group by being weak (Imagining the heroes), and now my life…

Kurobe was being dragged so far nearly dying.

Kurobe: (Weak and closing his eyes) It doesn't matter… I'm going to die anyway…

Unknown voice: Do you want to live? Do you want to go back home?

Kurobe: (Opening his eyes) Who said that?

Unknown voice: Do you want to live?

Kurobe: Who are you? (Realizing he was in a dark space) What? Am I…?

Unknown voice: No, you're not dead. No yet.

Kurobe: Where are you?

Unknown voice: You're lucky to be half alive, Kurobe Akatsuki.

Kurobe: How do you know me? Who are you?

Unknown voice: Will you believe if I tell you I'm a god?

Kurobe: (Smirking) Tsk! Really? God doesn't have a creepy voice. Why don't you say the true, Satan!

Unknown voice: Oh, interesting! You know I'm Satan, the Darkness lord. You're very smart.

Kurobe: Then, can you really help me? You know you're the enemy of the Holly church. The enemy of Lord god!

Satan's voice: I know. You're asking why a demon would help a human, our enemy?

Kurobe: That's right. We fight against your army! And yet you contact me? Why?

Satan's voice: Because I felt you have potential, a lot and it's unfair you die easily that's why I contact you. I'll give you a chance to live again.

Kurobe: Yeah right, but what's the price?

Satan's voice: Price?

Kurobe: You know in this world nothing is free. I bet you want my soul and turning me into your servant. How stupid do you think am I?

Satan's voice: He! Very smart. But why I want a weak soul? I have three demon generals who serve me well. A merely human won't be the same.

Kurobe: Then?

Satan's voice: I want your service, but first you must be worthy. That's why I'll give you a curse… the Hell Curse!

Kurobe: Hell Curse?

Satan's voice: It's a unique power from Hell. If you control it, you'll gain a great power, beyond than a human or demon will ever have! But not all humans have survives. That's why you must be worthy if you want to live again. In exchange you will be in my orders!

Kurobe: Why do you do this to me?

Satan's voice: Did you forget? Your party abandoned you! Your family is dead. All you have pass was disgrace. Forget your family (Imagining his family) Forget your friends (Imagining his party) Forget love (Imagining Akane) All of those are useless!

Kurobe: Fine. I don't care. I lost my family and my team. I don't have anything. If this curse turned me into a demon I hope Fujimura or the others kill me.

Satan's voice: So?

Kurobe: Go ahead, give me that curse and finish my life already!

Then a demon with black clothes was at his side, it was Satan in person.

Satan: Very well, Kurobe Akatsuki, if you survive, you will live again!

Then Satan pierced Kurobe's chest with his hands. Kurobe felt pain but also heat in his body. He screamed in pain until faint.

Kurobe woke up and realized he was on a shore, still inside the abyss. He noticed his injuries are bleeding yet.

Kurobe: My leg and my chest. Ah! It hurts! (Hard breathing) It hurts more, my hands are hot!

He went to the river, sinking his hands and smoke came from them.

Kurobe: (Nervous) What's happening? My hands are boiling! And my head! (Realizing his hands were on fire) AH! My hands! (Trying to extinguish them) WHAT IT IS? (Feeling headache) MY HEAD! (His head was on fire as some flesh were being ashes)

He goes to a crystal, seeing himself. He was in shock to see that his head was a skull on fire.

Kurobe: (Screaming in horror) AH? AAAAAAAAAAAAAAAAAAHHHHH!

He fainted. Then he woke up and saw his reflect on the crystal. He was normal again.

Kurobe: (Confused) What was that? I thought my face was torn and on fire. Like a grim reaper from hell. It doesn't matter, I have to get out of here first. (Taking his dagger) I have to return to the surface.

Kurobe was walking very weak, but then a monster was in front of him. It was the lion type monster.

At present…

Kurobe was scared as holding his dagger.

Kurobe: (Scared) I'm going to die really?

The monster attacked him and injure his arm with its fang. Kurobe screamed in pain.

Kurobe: (Injured) I can't escape with my injured leg!

The monster run to attack again. Kurobe was scared and paralyzed. But suddenly an unknown energy filled his body and moved dodging the attack.

Kurobe: My body reacted?

The monster attacked but Kurobe dodged again and again.

Kurobe: This is amazing. That curse really works?

Kurobe holds his dagger and despite being injured moved and kicked the monster. The monster was angry and ready to use its fangs.

Kurobe: Come here, bastard!

The monster attacked but Kurobe moved fast and pierced his dagger to its head, killing it. Kurobe was exhausted after fighting.

Kurobe: I did it. I did it! I killed a monster!

Suddenly he felt a pain inside his body. He was in the dark space again.

Kurobe: Again?

Then he saw someone in front of him. A skeleton on fire with dark clothes. It was stretching its hand to him.

Satan's voice: Go ahead Kurobe Akatsuki. It seems you adapted the Hell curse. Now, fulfill the pact with your inner demon. And you'll gain the great power to kill anyone. You will get your revenge for the ones who put you in this situation!

Kurobe: (Smirking evilly) Yeah, I'm a demon so I'll take my revenge!

Kurobe was stretching his hand to the flaming skeleton, nearly to share hands.

Akane's voice: Akatsuki-kun!

Kurobe: (Recognizing her voice) Sakurada?

Satan's voice: What are you waiting for? Fulfill the pact!

Kurobe touched the skeleton hands as being surrounded by evil power in his body. He seems being smirking evilly as being swallowed in darkness.

Akane's voice: Akatsuki-kun!

Kurobe was being confused as waking up before being swallowed completely by darkness. Then Kurobe was in reality, with the corpse of the monster that he killed.

Kurobe: Damn! What was that? I felt as my mind becomes evil like a demon, but… (Reacting) Well, whatever, I have to get out here, but I don't care… (Smiling evilly) Fine! I'll go and kill all my enemies! I won't be weak anymore, even it means I become a demon!

A device was summoned in his hand. Then a screen appeared with some data.

Kurobe: Wow! My level… increase by 10 time! (Checking the monster with his device) This monster is high level! Well, killing at high rank monster should give me a lot of experience. That curse… should improved my skills to kill that monster!

Taking his dagger, he began to cut the monster into steaks. Then he used some rocks with his dagger to make fire, then he cook the monster's meat.

Kurobe: I'm hungry. I need to eat to continue. (Eating the monster steak) Agh! It sucks, but I have to do it.

Then he used his device to a crystal.

Kurobe: That crystal seems special. (As checking its data) Ah! It's a high level healing item! Healing Crystal, I can create healing items with this. (Then he checked a huge mineral at some distant) That mineral is… Forever Iron? A very rare mineral which it's impossible to find at the surface! This mineral is considered the hardest item. Perfect to create weapons.

Kurobe was checking the materials who found.

Kurobe: What a luck, I'll send those to my magic inventory. (He used his device to collect those materials and was transported to another place) Great, I'll make items and weapons.

Other monsters appeared in front of him. He used his dagger and killed the monsters.

Kurobe: (Checking his device) Another high level monsters. It seems my level multiply a lot. If I want to improve my skill I'll need better weapons. Also I gained better magic skill, useful to create.

Kurobe used the material Forever Iron to create weapons by using his device.

Kurobe: Thanks to the academy lesson, we can create weapons easily by using materials. Let's see, I have to have weapons for close combat but also for distant combat… which one I should create…

He used the material and create two weapons: A long black blade like a katana, and a short gun like a shotgun.

Kurobe: Perfect! These weapons are awesome, all I need to complete is…

He used his dagger to make a tiny injure at his hand. Some of his blood stain his weapons and finally his weapons were created.

Kurobe: All weapons have to have our blood in order to use all its power, also only the user can activate them!

Kurobe carries his to weapons on his back.

Kurobe: I'll keep my old dagger yet until I find another use for it. Later I'll make healing items with the Healing Crystal. Now I'll go to the surface!

Kurobe keeps walking with a brave mood. At other part in the bottom of the cave, there was a room. Inside, there was a sky blue hair girl, who was naked and in chain. She was opening her eyes very weak.