I think i read it before, but forget it's name too, sorry.
That's okay :)
It sounds to me like "Shitteru Yo"
http://www.mangago.me/read-manga/shitteru_yo/
Could it be Kawaii akuma?
Yes!
Thnks :))
Thnk u guys anyway :)
Help!
Its about a guy(seme) who is really popular and acts like a nice guy but his personality is the exact opposite and he only acts like himself when his with his friend(uke)
And i think the reason why he acts the way he does at school is because he doesn't want the uke to get people's attention and so he made himself the center of attention