Hoshigari-chan no Kareshi Ka Keikaku

The two of them know each other's fap material, and they even rub each other out. Such childhood friends are Junto and Sato. One day, the AV that a classmate lent them showed a**l sex! Sato, gushing with curiosity, says that he wants to try it, and begs Junto to put it in. Junto gives in to the seduction, and...!