Responses
nevermind, just found it: http://www.mangago.me/read-manga/kono_ore_ga_omae_nanka_suki_na_wakenai/
also, I mixed 2 mangas in one; I found the one with the twins, but not the one with the seme kissing every girl =/
also found the other one, if anyone is interested: http://www.mangago.me/read-manga/koishiteru/
(ladies and gentlemen, thank you for reading my monologue LOL)
I'm looking for an older yaoi manga that has twins as side characters, one is a girl and the other is a boy and they both have big hair, it is kinda like a comedy, the seme only remembers the feeling of kissing the uke, so he goes from class to class kissing every girl to find the uke, and then the uke tries to leave the classroom, but the seme is blocking the exit, and the uke cries a lot.