While searching through my handy-dandy romance manga, I found a really weird psychological romance
manga.Aku No Hana
Description: Kasuga-kun steals a pair gym clothes of the girl he likes, the next day the girl that sits behind him reveals that she saw everything.
Now if he doesn't form a "contract" with her, she is going to tell.
The art is actually really good in the manga. And the character development is crazy.
A little bit (okay, a lot) of cussing.
I really enjoy this manga.
It was a little creepy but it was actually really good and if you're into psychological/romance shounen, then you should definitely read this.
There is also an anime but it only does half of the story and the artwork is a little weird.