Summer vacation, Protagonist Aoi Hiiragi who will do part-time job of coach in swimming school. The pupil, Three small girls.

A certain day, Aoi gets excited by girls school swimsuit appearances, have erected so that an acute pain ran through there. That sort of place, It is found by pupils girl and. [Healing? if it rubs. Then, Mei becomes sexfriend, The sensei is help.] To pupils girl, It is forcibly thrown down and...