Need help finding a manga !

Help pfv!
A while ago, I read a manga (I don't remember if it was one-shot or had more chapters) that looked something like this:

A weird kid (uke) who didn't care about anything, just beautiful things (if I'm not mistaken) and, the only thing he thought was beautiful, was an anime character (I think), he had several posters of her in the room. Then one day, he went to the bathroom and saw two boys having sex and, if I'm not mistaken, he thought the seme was beautiful. Then the seme went to apologize and such and from time to time I talked to him, and since that day in the bathroom, he started chasing the seme and taking pictures of him and replaced the character's posters with his pictures. Then, he followed the seed one day to a place there and saw the seed again having sex (he saw it through the mailbox) and got excited, then he ran. Only the seme realized that someone was there and the next day asked uke if he had enjoyed watching him having sex. Then uke in despair ran away and he followed uke to his house and went into the house and saw his pictures there. Then he had sex with uke and, after uke slept, he took a picture of uke sleeping and laughed. Then he saved the photo and, to our surprise, ON HIS MOBILE HAS A PHOTO ALBUM FROM UKE. Then he said something at the end like "I finally got you", something like that. Does anyone know the name?

SORRY FOR THE LONG TEXT ╥﹏╥