Aseru (Yaoi) manga
Kazuo is obsessed with his friend's older brother, Yuudai. When Tsutomu hits his Yuudai, stunning him, Kazuo decides to take advantage... and he doesn't care if either Yuudai or Tsutomu like it. (Warning: non-con)
Continued in 'Misshitsu' (also on Manga Fox).
Other manga by the same author(s)