Main character is a lazy high student who is not interested in anything including study. But his precious summer approaches its end without producing memories, so he confesses to his childhood friend just because she was cute. As he arrives home, he is greeted by new neighbor nephew dispatched as his tutor. The girl teaches him a lot about sex. Finally fun life begins as he gets private lessons and experiments with his childhood friend lover. More experienced older girls also start to pay attention to him. Is it possible to live happily together?