Kinky sex addict that is no feelings attached (cause his first love was straights but became his fwb so he gave up on love) gets accidentally sexually helped by office coworker he has a one sided rivalry with, coworker is softie who thinks mc is being abused by his partner (and not his own kinks) and wants to treat him better and asks to be his fwb instead, mc already had a fwb but he and everyone else stop ‘doing it” for him and only coworker does, they fall in love
Mujikaku Love Factor