8(Demon Slayer)

This idea is a bit based on  L3N0REXD's Yandere Giyuu videos on Youtube but also not.

Basically Giyuu is a yandere for Sanemi but Sanemi knows it and simply doesn't care how far Giyuu will go to get him as he likes that if he asked Giyuu, the other boy would basically bleed for him as long as Sanemi said he liked him.

At first Sanemi wanted to play with Giyuu, watch if he would really kill someone for him but after his brother had a nightmare about their father which lead to a talk between them, Sanemi wanted to see if Giyuu would go even further by accepting to be away from Sanemi just to get him(because most yanderes I have seen would prefer to die or kill their crush over getting separated from said crush).

So one day at school, Sanemi discretely gives a paper to Giyuu asking him to meet him an old club's meeting room(basically any place were no would be able to spy them).

Of course Giyuu was very excited and nervous when he read the paper and almost called his sister to share the news but he stopped himself believing that ti was better to share the news after he and Sanemi met.

At the end of the school day, Giyuu made his way to the meeting place and saw Sanemi already there. In the beginning neither talked but then Sanemi said that he knew Giyuu liked him which made Giyuu nervous as he couldn't know if Sanemi woudl reject him and what he would do if that happened.

But Sanemi also added he knew what type of person Giyuu was and liked it, which surprised Giyuu as no one outside his sister knew it but instead of questioning how Sanemi knew it, Giyuu waited for the other to boy finish talking.

So Sanemi asked Giyuu how far was he willingly to go to get him and Giyuu answered without thinking that he would do anything for Sanemi to which Sanemi smiled and said that he would love to have Giyuu as his boyfriend but Giyuu had to pass a test for that.

Giyuu froze at hearing that but his heart was beating excited at the chance of getting his man to be only his so he asked what Sanemi wanted him to do but the answer he got was unexpected and Giyuu wasn't sure if he could do it.

Sanemi had said that should Giyuu be able to deal one year in another school with only the ability to message and call Sanemi besides visits from the white haired boy during weekends he was free, that he would date Giyuu and make sure the whole world knew they were together.

Giyuu liked the idea of the last thing but he heard tales of his family from his sister and wasn't sure if he could deal with that as anyone could try to get Sanemi to be theirs while he was away.

Sanemi, realizing were Giyuu's thoughts were going to, added that he would have Genya contact him or he would personally tell Giyuu if anyone confessed or made a move at him while leaving him free way to deal with that person at his will.

So Giyuu decided to accept it and Sanemi to prove that he was serious, gave Giyuu the last things he had from his mother that he would not just give anyone(if it is a ring, necklace, etc is up to the writer).

What I want with this idea? Basically that Giyuu and Sanemi aren't well mentally but their relationship ends up being wholesome despite how toxic it could be(Sanemi manipulating and playing with Giyuu while Giyuu manipulates and kills anyone who would look even a bit interested at Sanemi) besides I like the idea of a yandere having their crush knows about them and decided to give them a chance with the need of a test to prove they were truly serious(as a yandere would kill for their crush but staying away from their crush? That isn't something I have seen).