Overview:

A gal who loves compensated dating and a regular customer of hers, an otaku.
The otaku, who is seriously in love with her, hears that he can confess his feelings if he seduces her with sex, so he decides to take on the challenge!
…But the gal is a slut and can’t compete with the otaku.
So an erotic after-school life begins, where you can get “trained” for a fee.
A big-breasted titjob in the classroom, cowgirl position play in the nurse’s office.
While being milked by the gal, does the otaku have a chance to win…?