A new request comes to Mr. Shinobu, a talented tutor who can always improve the grades of even the most incompetent students. The students this time are two idiots, a pair of brothers... But Mr. Shinobu knows that the motivation switch of male students with an abundance of sexual desire is in their lower bodies. He uses his mature adult body to toy with them with erotic tricks, and hints at a secret reward, and the virgin brothers change their minds! In order to get Mr. Shinobu to accept their throbbing dicks, they rush towards their dream first experience!