Looking for a Yaoi manga

Ok so there's a short cute boy and a rebellious looking boy (can't remember who's uke and who's seme). They were in school and I think the cute boy was getting bullied and the rebellious boy saved him then the cute boy found a fleshlight in the gym room and it could somehow connect to people butts. So when the cute boy stuck his finger instead it was like he was putting him finder in the rebellious boy's butt and he was feeling really good. And one day I think the rebellious boy was being attacked and the cute boy used the toy to connect to the bullies butt's to stop them. That's all I remember honestly....hope you can help me.