Boku no Kokoro no Yabai Yatsu

A "fearsome psycho-thriller" centering on "the dark side of adolescence." The manga centers on Ichikawa Kyoutarou, a person at the very bottom caste of his school, and who hides murderous impulse that lurks at the very bottom of his soul.

In reality, though, it's a sweet romcom between a messed up boy and a bright, if somewhat strange, beautiful girl. Brought to you from the zany mind behindMitsudomoeandRororro!, Sakurai Norio.