Omae Wa Hitsuji.

University student Sahara, with his horrible luck, loses his home when his entire apartment goes up in flames. Luckily, he is able to stay at a friend’s place. But he is suddenly mistaken as a suspicious person by his friend’s younger brother, Masaki. They manage to dispel the misunderstanding, but he is pressured into doing an unimaginable job…
(Source: Yaoi Desire Revolution)