Personally, I would've preferred it if Akira genuinely regretted it and asked for forgiveness without making excuses or something like that. And even though Masato ended up saying that he had feelings for Akira for a long time, he could've given the latter sometime to reflect upon himself because what he did (although their feelings are mutual) is still morally incorrect.
ps. Although this is a fiction, I was still uncomfortable
This will be one of the rare stories that I would be having a hard time moving on
Dang Kouki, you need to find a partner soon so that I'll feel relieved, even just a lil bit and not kill you for taking advantage of Nirasawa you messed up bastard. Although you didn't betray him in a way, I'll still kill you if you do that again
lol
So far this is the most peaceful manga I've read that involves Yakuza.