Yoshino had been stalking his old classmate Takase whom he used to abuse, but was finally caught snooping. Upon being found out they both started to learn the darkness's of their own hearts. (TBH it's not one of my faves, but it still goes here!)
Kaname's more successful older brother Souta has recently died, and one of the only things the brothers had in common was their love for a book by Tsujiura Ryousuke. By chance Kaname meets Tsujiura, and begins a sexual relationship with him... but Tsujiura knows more than he's letting on.
Yakuza in training Tatsuyuki, is heartbroken after a one sided crush falls through, and would just rather play around all day then train to take over the group. Because of this his caretaker sends him to a branch office in Fukuoka. There he wakes to find him self in some guys bed ... naked!? (only mildly twisted)
Yasaotoko to Sadistic