Priapus

Priapus - Mentaiko Itto Fun and silly (Priapus is a gorgeous man sent to Earth by Zeus, whose mission is to turn all men gay) and extremely explicit and hot (Priapus seduces a different man in every chapter). The last chapter, the one with the competition (where 2 men compete in a ring in front of hundreds of people to see who cums first) was the only "romantic" one.