Responses
Maybe this one? http://www.mangago.zone/read-manga/doushitemo_yaritakute_gakuen/
No... It's not this one... It's 3p/4p yaoi... But thank you for your help!
I believe you're thinking of http://www.mangago.zone/read-manga/yarisugi_party_night/ , :D
Help... This is about 4 or 3 friends i forgot, the uke is gullible and love big breast but end up always getting tricked by his friends to do 3p/4p he end up with one of his friends... I really wanna re.read it