Midara na Hina wa Haru wo Uru

Hiyomori is a withdrawn boy whose battered body is covered with scars and bruises. A long-time victim of sexual exploitation and abuse, he spends his weekends with clients his adult pimp finds for him; usually, men who enjoy violent sex. Hiyomori's miserable existence begins to change when he meets his new classmate Hazama, a cheerful boy who is determined to make friends. When Hiyomori sees that Hazama is not disgusted by his ugly wounds or scared off by the unsavory rumors surrounding him, he slowly begins opening his heart to him; but can Hazama's love rescue him from a life of abuse?

(Source: Anime Planet)