The black hair dude has to be his brother?

I never thought of this , but damnn he could actually be his brother cuz they kinda look alike (づ￣ ³￣)づ

I believe so too

Pretty sure. Rou and Omi are from a different story, these two oneshots from the same author. Rou is a black wolf.

Ahh yes i thought so too. The title is oath of allegiance