Class de Otoko wa Boku Hitori 1

Machida, a timid virgin boy transferred to an all-girls school because obviously this is normal in Japan, and ends up targeted by Rio and Mao. Machida, who was pressed against their breasts and teased over the edge, couldn't stand it and blew his load in a classroom full of girls!

Rio, the only one who noticed this, took Machida to the infirmary...