Otaku wo Karakau Muchimuchi Gal wa Jitsuwa Boku Senyou no Choroman Mazo Pet

An otaku who doesn't have much contact with people and a close gal who is extremely popular in class are actually in a sex-friend relationship...?! They have excellent physical compatibility, and the two are immersed in immoral acts at school, drowning in the gal's seduction and pleasure. However, one day, the otaku, who has been seduced so much, loses patience and begins his counterattack...? The whole story is immoral and full of love and romance!!! (source: Melonbooks translated)