Bored with her life, Nanako joins a members-only swimming club on the recommendation of her friend Kirihara Azusa. There, she unexpectedly runs into her ex-boyfriend. Suddenly, her monotonous daily life changes! The members discover secrets, and the electric massager sprays copious amounts of semen! A lesbian is playing with my friend Azusa! Even with my ex-boyfriend…! Nanako begins to immerse herself in lust…!