Onani Master Kurosawa
Also known as Fap Note
Simple Description: Death Note + school life + fapping
The story is a narration of Kurosawa, who has a habit of masturbating in a Girl's bathroom. Hilarity ensues as his secret is exposed.
While there are no H-scenes (and exceedingly few ecchi scenes) it's still rated as for mature audiences (for obvious reasons).
All 31 chapters have been scanlated.