After reading volume 1 of the novel i must say one thing, this MC is BEYOND pathetic. 99% of manga protagonists are shy loosers but this one is rare 0,5% of protagonists what break the stereotype. Earings and everything else aside, being dominated like this ... Humans who let this happen should not have rights to reproduce.
Being blackmailed like that can be solved with just recording on a phone and giving it to police.
Im genuinly worried for future of Japan if youth there read this kind of crap and think this is a normal behaviour.