Hikizuru Oto
In which our protagonist has an injury and to make up for the fact that it's "his fault", his childhood friend takes care of him, and appears possessive. But is there more underneath. Honestly, this is Harada. What can I say. It's messed up, extremely, but in a way that doesn't make use of rape. Instead, it uses guilt. The guilt of "crushing one's life forever with one little slip up." It's so wonderfully done and messed up.
When Night Falls
In which a boy tries to avenge his sister's murder by killing her killers. However, he finds out that he has a special power and can kill people in his sleep.
Sinners' Game
In which various people are haunted by dolls to make them commit one of the seven deadly sins so that they can eventually come together and play a game.
Children Can't Choose Their Parents