He won't fight because he doesn't like seeing people hurt? What a naive outlook. What would he do against an irredeemable sadistic monster that relishes in seeing people hurt? Also people will get hurt regardless due to his inaction.
I'm sorry because it's hard to continue reading upon learning the dude's name. He shares the same name as Shinichi Kudo from Detective Conan and it's weird seeing that name in an ecchi manga.