Do you know Guts? dude was born out of the corpse, living his live as a mercenary, fighting demon in daily basis, betryed by his own best friend, his girlfriend raped in front of him, fokin underdog strong ass bastard.
what I'm trying to say is, maybe this will be the starting point where the MC actually understood how the world works and then change his attitude towards it.
the only thing that I'm afraid is -like many other cases inside manga nowdays- MC won't get the equal footing with those criminals, no kills, no bloodbath, no psych reaction, no revenge, let bygone be bygone, only plot armor like when a cop responding to 261...well yeah, except it's too late that is.
I hope this manga will meet my expectation and not putting this NTR into vain just for the sake of boosting its popularity through skit like this.
damn that's a lot of rant coming from me