In a forest, many demons were attacking someone, but they were killed by many shots. It's seen a twintails red haired girl was using a tech rifle and advanced goggles. Then they disappeared in data.
Girl: What a disappointing. Those demons weren't too strong. I didn't use much ammo.
Some adventurers realized her action.
Adventurer: Who are you? Those weapons… how could you do that?
Girl: Ha! I don't live with ancient story! (Then her rifle disappeared in data, then in data handguns appeared on her hands) I love tech weapons! That's why I created them with my genius. I hope to improve more my skills!
Then in present, at Vermillion city, that girl was walking. She was tracking something with her goggles.
Girl: I detected many evil energies. Demons! But one of them was very strange. I have to investigate!
She was on the building roof and saw Kurobe's group in a long distant.
Girl: I find that strange track!
At next day at another hotel, Kurobe and his group were eating.
Yuki: We should be careful, we caused to get attention a lot.
Tsubaki: Right, those damn demons attacked!
Kurobe: We should leave this city soon.
Luna: Where are we going?
Kurobe: (Taking a map) To East, we'll reach the ocean. To that direction there is Neo Japan.
Yuki: Your homeland?
Kurobe: Yes. Honestly I didn't want to go there. But something is making me to go back there.
Luna: Wait! Kurobe-san, before we leave, I wish you have a date with me!
Yuki and Tsubaki were surprised to hear that.
Tsubaki: Hey! What do you mean?
Luna: You had your time with Kurobe-san. So I want it!
Tsubaki: (Little blushed) We weren't in a date!
Kurobe: Luna, I don't think that's a good idea.
Yuki: Kurobe it's fine. I think everyone deserves the same.
Kurobe: Are you sure?
Yuki: Unless you can do something cute before we leave the city.
Tsubaki: Just don't do something so indecent in front of people!
Luna: What do you mean?
Kurobe: (Upset) Just shut up!
Then, Kurobe and Luna were walking. He was using his hood and mouth mask to hide his face.
Kurobe: I can't get attention again. After about yesterday.
Luna: Geez, Kurobe-san. (Taking his arm) It's fine.
Kurobe felt her breasts on his arm as she waving her tail which shaking her skirt.
Kurobe: (Little blushed) Don't do that! People is watching us!
Luna: I don't mind. The beast race don't affect.
Kurobe: But humans yes!
They were walking then Luna saw a female street seller. She was selling small ornamentals.
Luna: Kurobe-san, look, they are cute!
Female seller: Oh! A beast race girl, you have good tastes!
Kurobe: You're interested in those?
Luna: Yes!
Female seller: Young man, these accessories are pretty. Any girl will be happy to wear them. Even a pretty wolf girl like your girlfriend.
Luna: (Smiling and blushing as her hands on her cheeks) Kya! I'm Kurobe-san's girlfriend!
Kurobe: She's not my girlfriend!
Female seller: Come on, don't be shy.
Kurobe: Fine, Luna, what do you want?
Luna: (Pointing something) Well, I want this!
Kurobe and the seller were worried to see that.
Female seller: Well, if the miss wants it. I can give you.
Luna: Yes!
Luna took the ornamental and wore on her neck. It seems like a little necklace, but it was a pet collar.
Luna: How do I look?
Kurobe: Well… you seems a domestic wolf.
Female seller: Or like a sex slave.
Luna: Sex slave?
Kurobe: No!
Then they keep walking as ignoring the people who were watching at them. They were visiting some places until they arrived to a bridge.
Luna: This place is exciting, too bad we'll leave.
Kurobe: I have some business to do, you girls don't have to follow me.
Luna: It's nice if we go together in journeys.
Kurobe: This is weird, I was better alone but with you at my space…
Suddenly they felt something was coming. It was a shot from far distant. Kurobe reacted to move but Luna moved faster and jumped to Kurobe, dodging the shot. His face buried on her breasts.
Luna: Kurobe-san, are you okey?
Kurobe: (Low speaking) You didn't have to help me!
The shot destroyed a part of the bridge, people were running away.
Luna: Where do those shots come?
Kurobe: How much time you plan to stay over me?
He grabbed her head and threw her away.
Luna: You're so mean!
Then more shots came. They dodged those shots which came from far.
Kurobe: Those shots.
He moved very fast, leaving Luna alone.
Girl: Eh? Where's that boy? I lost his track!
Suddenly Kurobe was behind her and grabbed her shoulder.
Kurobe: I found you!
Kei: (Funny scared) KYAAA! STALKER!
Kurobe: (Funny upset) I'm not!
It's seen she has long red twintails. She wears red short sleeveless jacket, short white tank top, black tight shorts, black long socks, black shoes. She was carrying a tech sniper rifle.
Kurobe: The shooter… was a little girl?
Girl: Hey! Don't call me little! I'm 14 years! I'm an adventure who uses advanced weapons!
Kurobe: Advanced weapons, like that rifle which shots laser bullets.
Girl: Right! And I kill demons! Powerful like you! (Appearing advanced goggles, as reading his energy) You have evil power!
Kurobe: What an interesting device you have.
Girl: Yeah but I won't share with you! (Appearing tech shoes) Smell you later!
Her shoes were propeller shoes, the girl was descending at side of the building.
Girl: (Mocking) Hahahaha! Too slow!
Luna's voice: There you are!
Luna jumped and tried to punch her, but the girl dodged and was falling. Her propeller shoes let her land safety.
Then Kurobe and Luna were in front of the girl.
Kurobe: Interesting toys you have, but you're making mistake if you plan to kill us.
Luna: That tiny girl was shooting us?
Girl: Hey as you should know, I'm Kei Sasaki! I'm the smartest girl to create advanced weapons! And tools which help me in battle!
Kurobe: A human with high intelligent, in my academy we didn't have smart people using tech weapons.
Luna: Who needs weapons? With my punches, I kill anyone!
Kei: What a wild species. I'm smarter than you also, you can't… (looking at Luna's breasts) beat me… (Looking at her own breasts, they're small) Grrrr!
Luna: (mocking) Well, sorry, but you're lacking nutrition in your body than your brain.
Kei: (Taking her handguns and pointing to her) You're my enemy!
Kurobe: Any problem, little girl?
Kei: (Funny upset) You call me little because I'm flat?
Kurobe: I didn't say that!
Kei: Don't underestimate me!
Kei used her handguns and shot them. Kurobe and Luna dodged those attacks.
Kurobe: (Ready to take his shotgun) Don't make me to kill you.
Kei used her propeller shoes to move fast and was behind Kurobe.
Kei: You have classic weapons. I'm glad to take it.
She took his shotgun and moved away very fast with the help of her propeller shoes.
Luna: Hey! That's Kurobe-san's! Give it back!
Luna run to Kei with her hands and feet on the ground, like a wild animal.
Kei: Wow! That beast race is impressive! But mind is over muscle!
Luna tried to kick her but Kei moved away.
Kei: Too bad I have to kill a female beast race, but you're too dangerous to be alive!
Kei used Kurobe's shotgun to attack Luna, but nothing happened.
Kei: What? This old weapon should shoot easily! It doesn't have bullets? (Checking it) Where's the bullets case? How that boy can use it? It's magic?
Kurobe: (Arriving to them) It's useless. My weapons are made by a rare material, also my blood is mixed, so I'm the only one who can use it.
Kei was upset and threw away his shotgun. She took her rifle.
Kei: It doesn't matter! I…
Suddenly Kurobe was behind her. His blade was on her neck. She was in shock.
Luna: You shouldn't fight Kurobe-san. He's too strong.
Kei: (Angry) No! Mind is stronger than strength!
Kurobe: What are you saying?
Kei: (Angry) I won't be treat like weak because I'm lacking of strength!
//Flashback//
It's seen a kid Kei who was fixing a motorbike. Some other children were watching her.
Kid 1: What's up with her?
Kid 2: Believing herself very wise!
Kid 3: She wants to be smarter than us!
Kid 4: Yeah! Let's play with normal kids.
Kei was very sad to hear that as other kids were away from her. Some years later, she was creating some advanced weapons like guns. Some people were admiring her.
Man 1: Hey miss, you have a good skill in tech!
Kei: Thanks.
Man 2: Why don't you go to study to other lands. They would pay you a lot with those guns!
Kei: Sorry, but I'm not interested in selling my knowledge for wars. Because I will use this creations to hunt monsters! Like some adventurers!
Man 1: Really? What a stupid thing!
Man 2: You're wasting your mind by yourself!
Kei was upset, as ignoring some company's bosses as offering her jobs.
Kei: No! I won't be an employee for companies that can't face monsters and demons!
Kei was walking as being ignored by other people.
Kei: I don't care low mind people. I'll prove I can defeat many challenges by my knowledge and tech weapons!
//End of flashback//
Kei: I won't let my knowledge be weak than your brute power!
Kurobe: I don't have time for your childish behavior. Now go away or…
Suddenly a very fast slash passed through them. They got some injuries.
Kurobe: What?
Then more slashes went to Kei. Kurobe was on her side as protecting her from those slashes. He got too many injuries.
Luna: Kurobe-san!
Kei: Hey! Are you okey?
Kurobe: (Injured) Damn! Those weren't normal slashes or shots!
Kei: Why? Why you protected me?
Kurobe: Shut up! It's just you were in my way!
Kurobe was injuried, Luna tried to help him.
Luna: (Giving a potion) Here, drink this potion.
Kurobe drank and recovered. Kei was amazed for that.
Kei: You got medicine items.
Kurobe: I wonder what were those attacks.
Kei: (Using her goggles) Let me investigate. (Reading some tracks) Those weren't shots, neither slashes. It was caused by physical attacks!
Kurobe: What?
Kei: Yeah, they are demon birds! Those kind of monsters are known for being very fast like the wind. That kind is like roadrunner but very fast. Mostly they kill their preys in an instant!
Kurobe: So Satan's army won't attack me, now they sent monsters!
Kei: Eh? Satan? You mean the darkness lord Satan?
Luna: Yeah, Kurobe-san is chasing him!
Kurobe: But I don't know where he is. That's why I hunt demons and monsters to know!
Kei: Wow! You're really a scary guy.
Kurobe: We have to move; those speedy birds will attack again.
They moved to an opened site, Kurobe was taking his chain spear.
Kurobe: Where are those monsters?
Luna: (With her ears reacting) Kurobe-san! They're coming this direction!
Kurobe threw his spear and killed one of those bird monsters.
Kurobe: Got ya!
Kei: What an awesome weapon! You can control it as if it was alive?
Kurobe: You'd better not knowing.
Luna: Watch out!
She tried to strike but the monsters were too fast for her. She was injured with some slashes.
Kurobe: Luna! Be alert!
Kei: I found them! But we need to move fast and make them to follow us to an opened site to strike back!
Luna: How can we do it?
Kei: I have something which can help us.
They went to an alley, there was a motorbike.
Kei: It's my first creation from my childhood. I used it to move away.
Luna: What is that?
Kurobe: (Amazed) A motorbike? I always wanted one!
Kei: You have those likes? Well, be worthy to see one.
Luna: So what's the plan? I'll be the decoy?
Kurobe: No, this time I will be! Those monsters are after me!
Kei: Why you?
Luna: There they go!
Kurobe: I'll test this thing.
Kurobe took the motorbike and turned on. He rode the motorbike and went to another direction.
Kei: (Using her goggles) There he goes! (Reading some signs) Those birds, are following him!
Kurobe kept riding as the monsters were after him.
Kurobe: (Smiling) I like this bike! (To the monsters) Come on! Here I am!
He arrived to an opened place then he was riding in big circle as the monsters followed him.
Kurobe: I got you where I wanted!
He used his shotgun and killed many monsters with each shot.
Kei: Wow! He can use that weapon, I see I heard the blood pact in weapons, they are some common.
Luna: Yeah, rock it! Kurobe-san!
Kurobe almost killed all monsters but the last one was very fast and attacked the motorbike damaging it. Kurobe was losing control and jumped. The bike was damaged.
Kurobe: Shit!
Then the last monster was moving very fast and injured Kurobe.
Kei: Watch out! Those monsters have an alpha! And that one is stronger than the others!
Kurobe: I'll have to use it again! But I have to make sure to use it in some seconds because I'm tired of previous battles!
Kurobe put his hand on his face as turning into his demon form.
Kei: (Surprised) What? A grim reaper? No way! That's the rare demon power I detected!
Luna: (Worried) Kurobe-san! Don't risk yourself!
The bird monster moved and pierced Kurobe's chest. Luna and Kei were in shock to see that. But Kurobe grabbed its peck despite being injured.
Kurobe: I got you!
He used his chain spear to pierce the monster's head, killing it.
Kurobe: Enough for now.
Suddenly he felt pain as turning back to human form. He was exhaling very heavy.
Luna: Are you okey, Kurobe-san?
Kurobe: Yeah, it was few seconds I managed to not lose control.
Kei: I can't believe you hide a powerful monster inside you.
Kurobe: Now you know my secret, I wonder if I should kill you.
Kei: (Funny scared) Ah! No, no, no, no!
Kurobe: I was joking.
Luna: You can't defeat Kurobe-san easily. You could be dead if he used his demon form.
Kei: If he's a grim reaper… (Funny confused) Why don't you have a scythe? And why you were on fire?
Kurobe: Very funny.
Suddenly a demon appeared and was escaping. Kei killed it with a shot from her rifle.
Kei: I knew a demon was ordering those monsters.
Kurobe: Good shot.
Kei: Tell me. Who are you really? That monster face, was a demon too?
Kurobe: Yeah, Satan cursed me.
Kei: What?
Kurobe: Sorry for scaring you. We leave.
Kei: Hey, wait! I wasn't scared at all, just in shock.
Luna: Then, let Kurobe-san alone!
Kei: You are the target of those demons and monsters. Will you be okey?
Kurobe: Don't worry. Also sorry for your bike.
They saw the motorbike was destroyed.
Kei: No problem, I can fix it. Also I want to know you more. Those battle skills, I'm interested.
Kurobe: Are you sure? Remember I'm a demon.
Kei: If you try to attack me… (Summoning her two handguns) I'll find a way to paralyze you and escape.
Kurobe: You little…
Then they were walking.
Kei: Wow! You can carry big items with your device. You must be from Neo Japan, they have that kind of technology!
Luna: I wish I could visit Kurobe-san's home.
Kurobe: Yeah, you can fix your bike when we are in other place. But now we must continue the journey.
Kei: You're weapons seems to be made with a rare material. I'm very curious!
Kurobe: I'll show you later, also I wish to make a bike like the one you had.
They walked until they meet Yuki and Tsubaki.
Yuki: There you are. We have waited for your return…
Yuki and Tsubaki noticed Kei.
Tsubaki: (Angry) Akatsuki! You lolicon!
Kurobe: No!
Yuki: (Funny upset) Kurobe! You had me and yet you add more girls? Now a little girl.
Kei: Hey! Don't call me little!
Yuki: Yeah, sorry but that appearance is hard to believe.
Kurobe: Her name is Kei. She helped us in an attack.
Yuki: Satan is still chasing you.
Luna: Damn! I want to crush his head for attacking Kurobe-san!
Kurobe: We must go, but the ocean is very far, it will takes more days, then we have to get a boat to cross.
Kei: Hey, then let me join to your group!
Everyone realized her words.
Kurobe: Really? Why?
Yuki: (Upset) Great, another girl with Kurobe. Damn!
Luna: If you want.
Kei: Yeah, I'm little but smarter! Trust me! Kurobe, if you let me, I can make something helpful for the journey!
Tsubaki: (Smiling and closer to Kei) Really? If that means to avoid walking large roads! I'm glad to become friends!
Kei: (Smiling) Yeah thanks! I'm glad to become friends… (Suddenly was in shock to see Tsubaki's breasts) eh…
Tsubaki: (Little confused) What?
Kei: (Funny upset and ignoring her) You're my enemy too!
Tsubaki was little confused to hear that.
In a hideout; Mavka, the female general demon was angry.
Mavka: That bastard! Enough! I'll kill him!
Demon: What are we going to do? Mavka-sama? If Satan-sama realizes we failed?
Mavka: (Smiling evilly) No! This time I have a better plan! Let's see… maybe I should involve that kid's party. Hehehe!