Aki is not a bad guy. Period.

I can honestly see why Haru forgave Aki after the assault. He said himself that it’s not what he should’ve been apologizing for. Haru has always wanted to be with Aki physically and mentally but he could tell that the reason Aki was doing that wasn’t because he wanted him in that way but because something was wrong. He was upset by the fact that he perceived Aki’s words as “you can’t help me because you don’t matter to me like that”. That scene was so much more complex than the typical ‘force’ scenes in other BL manga and the fact that Aki apologizes so profusely afterwards means he admits it was wrong and he sorely regrets it. He’s not a bad person. He is complex like all of the characters in this story and sometimes good people do bad things under high stress/emotions. We are only human and have not and never will fully outgrow our primal instincts, meaning we are very capable of doing stupid shit when we’re upset.