At the popular swimming school led by instructor Natsumi Horiguchi, numerous participants have gathered. She carefully teaches everything from the secrets of graceful swimming and stretching techniques to improve flexibility, to more intimate, personal approaches. After one lesson, a student surprises her by confessing, "I love you, sensei," leading to an unusual turn of events. Initially shocked and resistant, Horiguchi-sensei gradually finds her feelings shifting—until ultimately, she ends up being overwhelmed and taken by her student. With captivating instruction and an unexpected storyline, this school experience is so compelling you'll want to enroll immediately!