Swimming school summer camp.Under the blue sky, the lesson should be lively, but the students Shota and Chibisuke ignore the swimming and chase after the beautiful ass of the beautiful coach "Ema"."Ema" scolds the two of them for running out of patience, but later gets a hot counterattack from Shota and the others.One day, Chibisuke suddenly drowns during a lesson, and "Ema" comes to the rescue.He was accused of something and was toyed with by the two, and in the end he even had sex.However, that night, Ema took action to comfort her body, whose crotch was aching and hot.Before going home on the last day, what is the commotion that begins with a certain wish...?