I'm a bit of a bitch, but I'm not a bad guy... Why I became a slave of my classmate (a pinzaro-girl) who has a bad personality miru

This work depicts sex with a classmate's girlfriend whom a man who felt uneasy about his first experience with a classmate, with whom he had already established a relationship, met at a pincarlo. The situation of having sex with someone whose personality he feels he does not like is interesting. The essence that men will follow whatever she does when they see her technique, which is good at fellatio, is richly depicted.