I mean, it is a solid 5 if I'm being conservative but it can be 6 occasionally here and there.
It's probably the last thing I would read though cause there are a bunch of series out there better than this.
What was the reason he was adamant to stay in F rank again and can't even at least take it up to D or C rank? Either the author stupid as fuck or it's their editor 😥
It is absolutely naive and morally degraded to think consciously sparing a murderer like him would make you become a better person, but then again he is a minor so I guess he can get away with more murders at least until he became an adult then.
I mean.... the girl is not exactly wrong... MC seems too soft to subdue the girl's overall values and personality in order to acknowledge him as a worthy master...