{discontinued}yandere kny oneshots.

platonic yandere rengoku x sister reader

This request was submitted by RodriguezRoyalty

Kyojorou and yn sat next to each other, they were twins and their mother had just died from a sickness.

Both of them knew that this was going to happen but it didn't make it any less painful.

Yn tried her best to not cry and it seemed to be working but kyojorou on the other hand didn't have such luck because he started to burst into tears.

"Hey shut up you pest!" Their father yelled before hitting him, yn was by kyojorou's side immediately.

"Father! Why would you do that-" yn's words were cut of when a smack on her cheek.

"Get out unless you want that to happen to you too" her dad warned, yn wasted no time and got out of there and brought kyojorou with her.

She helped him walk, "sister you don't have to do this" he told her as she was bandaging him up, it had only been a few punches but he was pretty bloody.

"I don't do these kinds of things because I have too it's because I love you" yn smiled at him and to kyojorou she looked absolutely identical to their now deceased mother.

It made him want to protect her, no need to protect her, he had failed to save his mother but there was no way in hell he would let anything happen to her.

With out thinking he buried his face in her chest, yn new what he wanted, this was the type of hug mother would always give kyojorou so she wrapped her arms around him and brought him closer.

Yn was unaware of just how much kyojorou needed her know...

It started off with little things such as him freaking out when she got something as simple as a paper cut and keeping a watchful eye on her.

Then one day their "dad" decided to hit her and kyojorou went full beast on him, of course he made sure yn didn't have to see it.

What had happened was that yn was simply talking to their father about how great kyojorou was doing as a demon slayer but he got annoyed by it then abused her with his hand.

Unfortunately kyojorou had been away on a mission so he didn't know about this until when he got home later that night.

At first he was confused because for some reason yn's door was locked which was something she never did because she always did just in case a demon came into her room.

Then what made him insanely worried is when she didn't answer him he ended up breaking the door down, because no matter what the one thing he never heard from her was silence.

But the final thing that put his yandere instincts into full power is when he saw her bloody on the bed.

"Yn who did this to you" was the first thing he said once he got close enough to touch her.

"Father" she whispered out, that was it the last string keeping him from killing their father just snapped and the urge to end his life came in full force.

Kyojorou of course couldn't leave yn like this so he cleaned her up first, them made a meal for her and placed her into bed, he felt himself smile at the find memories of taking care of his mom and yn looked so much like her that it they kept flowing into his head.

Then after he knew she was fully asleep did he decide to strike, he lurked towards his dads room.

He then carefully grabbed his father careful not to wake him up, then dragged him into the deepest parts of the woods.

Kyojorou waited for him to wake up and the moment he did kyojorou started to beat him until he was ten times more bloody then he had made yn.

"How dare you hurt yn your the absolute lowest of the low, hurting your own children makes you nothing short of a monster" his dad couldn't speak because kyojorou had beaten His vocal cords to a pulp.

After a very long time of torturing his dad kyojorou finally got board and decided to kill him, "good bye dad" kyojorou said before finally bringing his fist down and killing him.

By this point kyojorou had blood on almost every part of his body and the smell of blood was horrible but he ignored it because this entire thing was all for yn.

He dropped his dads body in a lake and then went home to go think of excuses he could tell yn in the morning.

Once he got back home, he made sure to visit yn's room once more, he became incredibly happy when he saw her sleeping peacefully.

Kyojorou stroked her hair and watched her features in awe, she did look more and more like there mother every time he saw her.

'don't worry my dear yn I will never fail you like a I failed mother, everyone that talks down to you or hurts you will feel the wrath of the burning flame"

Kyojorou hugged his dear sister one more time before leaving the room to wash himself up.

Ok end (was this good?, I tried to keep it linked to kyojorou being obsessed with yn because she looked like his mom as possible)