Scarlet

When student, Akio, falls for his beautiful classmate, Ryo, he quickly finds that Ryo has a cheating streak a mile wide. When Akio tries to end the relationship after one affair too many, Ryo goes to some drastic measures to show his love for Akio is true -- even if it means making him bleed to prove it. Ryo's a complicated boy with issues that run deep, but will Akio be able to save Ryo from his own loneliness? Aside from the title story, there are two side-stories that explore the complexities of a one-night stand and what happens when two boys from vastly different social circles get together.

(Source: Tokyopop)