"I, Mayu Nakayama, have fallen in love with a girl!" Mayu, a somewhat introverted member of the literature club, has developed feelings for Shiroya, another shy member of the same club. To get closer to her crush and become friends with the admired "Sayaka-senpai," who is also a member of the literature club, Mayu enlists the help of "Kana-senpai," the captain of the swim club she belongs to. However, will their plan succeed with the impulsive and reckless "senpai" couple's assistance? "These people are crazy!" Experience a youthful summer as they dive into the pool!"