Erotikku ni Oborero! Released: 2004
"I fuck around cause I don't want to break your body???" Are you fucking kidding me???? That's your excuse to fuck around behind your lover's back??? He's the most disgusting bastard alive! If it were me, I would be fucking pissed, like thanks for telling me after some years you've been screwing me! What a slut!!! Substitute my ass!!!! The uke is too pitiful.
Hidoi Otoko (AOI Akira)
As the name of the manga indicated, Eiji,the seme, is and always will be a cheating bastard. He can sleep with anyone without guilt as long as he can justify it. I hate him since the first chapter.
Hero Heel
Sawada is such a douche, Katagiri would be a better choice. But since you can't choose who you fall in love, I kinda understand Minami to choose Sawada.
Recipe
His cum was dripping down on her legs, but you still want him to f**k you? I'm pissed of at how weak and stupid the uke was. Instead I want to see the seme cries and begs, this is not satisfying at all!
Komatta Toki Ni Wa Hoshi Ni Kike!
The most ambiguous relationship in all shounen ai I've read so far, I know that Shounen Ai tends to be like that. It's frustrating to have to interpret their relationship yourself, but I really love this manga. Kiyomine was a bit of slutty jerk though. I can totally imagine Kiyomine having multiple sex partners, and then getting mad at Takara when he find himself a girlfriend.
Breath