So basically its a BL/yaoi, black and white, and in my memories the title was something like tim & jin or something similar but I cant find it!!
its about a straight white guy who is friends with a gay korean guy (but the white guy doesnt know that hes gay)
and they are both at a themed party i remember and the straight friend catches his gay friend having sx with another guy and thinks its not consensual but it actually is, so he beats the guy who he was having sx with.
And so now he knows that hes gay etc and they fall in love.
the gay guy is a beefy bottom with black hair and the other guy is blonde.
and im pretty sure its a webtoon rather than a manga but its in black and white.

Please help me find the name!!!