So... how the heck a 13 years old can be a Yandere? Btw sorry for tearing you up yesterday XD I kinda cried also while I was writing it (that explains the huge mistakes lmfao). And sorry for this one shot. I just edited this chapter because I have something in my mind of continuing this in a second part also.

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(Y/N) recently joined JUNGLE Clan, happy that she could finally meet the J-ranks and the King himself. She was amazed by all of them, but the person who caught her eye was Sukuna Gojo, the second youngest person here. It wasn't fair. She was younger than the greyish purple headed boy with only a few months!

"Hey, Sukuna, you gonna buy me a few things from the shop?" Mr.Iwa said after drinking his last can of beer.

Sukuna mumbled a quick 'okay' as he was trying to beat (Y/N) in his favourite game, but they were a tie. Sukuna accepted only (Y/N) being in his small 'green family'. He usually hated people of they tried to become J-Rank. He preffered things like this.

Although something always made his body fill up with anger.

And that was the time when (Y/N) had to be near other JUNGLE members. It was okay for him if she talked with girls, but if he sees her with boys that are almost the same age as both of them, he wants to kick their asses or even the worse....

...kill them...

"Sukuna! I'm starting to lose my patience..." The old man spoke, walking towards the TV, pulling the cable out, bringing both kids back to reality.

"Hey! I was gonna win!" (Y/N) whined, stucking her tongue out at the boy next to her. Mr.Iwa could only chuckle at the sign of these two. "Anyways, I will go for a walk, sitting here makes my butt hurt." She mumbled, jumping of the box-like living room and walking away.

"Might as well leave too, Sukuna. Those things I ordered won't fly alone. Except..." Iwafune looked at the green parrot, Kotosaka.

"Ah! No way! No way! Sukuna go!" Kotosaka started flying around after the toy plane that kept flying in circle around the living room.

"You heard him. Now shuu!" The eldest member smiled.

~~~~~~~~~~~

(Y/N) was sitting on the roof top, trying to think of something to do. It was unusually hot for this time of the month and all she could do is roll around and die in boredom.

"I hate days like these. I wanna plaaaaaaay." She whined, taking her katana out, the sunlight shining at the sparkly clean metal.

Every J-rank had a special weapon. Iwafuna owned a gun, Sukuna a scythe and both (Y/N) and Yukari owned a katana. Yukari usually scoffed at (Y/N) when she did something wrong with the katana. And not that the attack was wrong, but the way she did it was usually 'gross' and 'not beautiful'....

Her green aura surrounded the katana, her (e/c) shining. She took her PDA out, typing something.

"Launch missin #4560." She smirked, looking down at the street.

"J-Rank voice accepted. Launching mission #4560." The green parrot on the screen said in it's robotic voice, then vanished, sending the missions to every person who played their 'special little game'.

(Y/N) only chuckled devilishly, waiting.

~~~~~~~~~

Yata Misaki, the vanguard of HOMRA, was skating slowly down the street, Rikio Kamamoto walking right next to him, whining for every step he took.

"Stop it, Kamamoto! We are almost at the bar, I think..." Yatagarasu said, jumping off the skate as he saw something unusual. "Those guys... Why are they laughing at us?"

The blond fat guy looked towards the direction that his friend pointed in, taking off his black sunglasses.

"Who are these?"

"Dunno, but they are acting weird, don't you think?" Yata fixed his beanie.

The boys smiled at the two clansmen, their phones ringing the tone of the JUNGLE earned points.

"Say hello to the J-Rank from us!" They yelled, disapppearing into the crowd.

"Say hello to the J-Rank?" Kamamoto repeated, confused at their sudden words.

Then Yata heard a slicing noice, causing him to look up in the air.

"Oh, what the fuck?!" The chestnut haired vanguard pushed his fat friend away from the spot, just in time before someone crashed on the ground, slicing a bit of the asphalt.

"Hehehe. Oh, the stupid HOMRA. Almost fell inside the trap I made." The young girl chuckled. Locks of her (h/c) hair were hiding her shining (e/c) orbs, making her young-like, childlish look, look like a bigger.

"W-ha... W-Who are you?!" Yata stuttered, his cheeks pink.

"The name is (Y/N). I'm a J-Rank in JUNGLE. But probably you knew that. After all, those idiots told you." She smirked, her katana glowing in bright green.

"What do you want from us?" Rikio yelled, raising his fist.

"I wanna play." (Y/N) smiled.

"Game's over kid. Just go home." Yata said, trying to hide the small blush that covered his face.

"Aaaaw. But the game just started. And you are worth a lot of points as I know." She chuckled, her weapon in front of her. "Let's play!"

~~~~~~~~

"Sukuna, have you seen, (Y/N)?" Yukari asked.

"Na-ah. Haven't seen her since she left for a walk." The young boy responded.

"She has made a mission for a game she wanted to play alone. Mission #4560 - Find the HOMRA vanguard." Hisui Nagare, the Green King himself, spoke.

"What?!" Sukuna pulled his PDA, reading the message that had popped on his screen, "Launch mission #4560. Find me someone to play with, if it can be the silly vanguard from HOMRA." He read, his eyes widening. How didn't he hear his phone beeping or something?!

"And apparently she is not enjoying her game anymore." Yukari pointed at the big screen, an image of the fight popping up.

"My, my. That boy has the guts to fight her." Mr.Iwa chuckled.

"That's because it's 2 versus 1!" Sukuna growled. He watched carefully then out of the sudden, (Y/N) blocked the attack from the chestnut haired boy but her face was inches away from his.

That made Sukuna heat up, anger rising up inside him.

No one was going to fight against her and NO ONE was going to be that close to her.

"That idiots is going to get it!" Sukuna yelled, his scythe glowing in bright green. He stormed out, leaving the three men behind.

"This will be beautiful." Yukari said, his whole body shining at the thought of a beautiful battle, while Iwafune and Nagare only facepalmed.

~~~~~

(Y/N) was pushed at the wall, her back making the wall break in a few places.
"I have to admit it, kiddo. You have a lot of energy stored inside yourself." Yata chuckled, followed by Rikio.

"Oi, shut the hell up!" She hissed, picking up her katana from the ground.

"I had enough of this." Yata yawned, leaving the last for his partner.

(Y/N) couldn't feel her legs right now, and her vision was somewhat blurry.
'How the fuck did I lose this?!'

Rikio jumped in the air, kicking a red flame towards (Y/N).

She tried her best to block the attack with the katana, when it pushed her backwards, causing her to hit her head.

She groaned in pain, touching the wound she had on her head. Her hand was bloody, making her disgusted.

"Oh shit." She mumbled, before loosing consciousness.

"(Y/N)!" Sukuna yelled, jumping off from the rooftop he was on. He touched her soft cheek, blood streaming down her face.

"More kids?! Don't tell me that the Green King himself is a kid also?!" Yata laughed.

Something inside Sukuna jumped. A nerve, he guessed. But it was enough to make him jump towards those two with an attack both red clansmen could not block.

"No one touches, (Y/N)!"

^°^°^°^°^°^

(Y/N) groaned from the pounding head, trying to open her eyes.

But she was so tired.

"Please tell me she will be okay, please..." She could hear Sukuna's voice near her.

"She will be. Now go wash yourself. Your all covered in blood, Sukuna!" That was Iwa-san.

Blood?!

(Y/N)'s immediately snapped open, as she searched for the grayish purple haired boy.

"Sukuna?" She froze as she saw him. His clothes were all soaked in blood, his face was covered in blood.

"Those bastards managed to escape from me... I will search for them...I..."

"Sukuna!" She cut him off, her eyes not falling down from his bloody clothes. "That's enough..." She mumbled, her head pounding once more, making her yell from the pain.

"(Y/N)!" Sukuna ran towards her, his body trembling. He did not know what to do right now to help her.

"Why did you came? To save me?" She suddenly asked the young boy, making him stiff.

"I... I hate when people are really near you. Especially boys. I mean, I saw you fighting that idiot, and when you blocked his attack, your face was near his. I couldn't stand that. And the fact that they were hurting you. That made me furious inside. And I feared that he could kiss you or something... " He mumbled the last sentence but not quietly enough, because she managed to hear him.

"That boy? Kissing me?!" She smiled. Sukuna nodded sadly, watching the ground. "Blah!" She laughed, making the boy in front of her shine from happiness.

(Y/N) jumped off the couch she was lying on, loosing balance for a few seconds. After she regained her balance, she walked towards the boy, looking him straight in the light green eyes.

She fixed her bandage and then leaned, pecking him on his lips, like a childish kiss.

But it was enough to make the young boy flush red.

"You are my hero, Sukuna!" She chirped, hugging him. "And don't worry, next time we will finish them!" (Y/N) continued.

Oh, you bet he will finish the job he started. No one touched his (Y/N) after all. People have to pay after that. Plus he had to warm up for the upcoming game. Where he and the green clan had to defeat the final bosses.