Can someone tell me what that one bl where the main character turns into a magic girl and ...

Can someone tell me what that one bl where the main character turns into a magic girl and all the monsters rape him and then the main bad guy is like also his crush and it’s literally just an awful story??? I wanna hate on it but I can’t do that without knowing the name

(Im giving full detailed reason why it’s awful to my imaginary audience LOL)

Thanks!!