Suzuki is the last remaining member of Tadano High School's swimming team. If no new members join the team this year, it will be cancelled altogether. Fortunately, a pretty teacher, Sakuma, is picked as the swim team's new coach. After class, 30 young men gather at the poolside. Many of them want to join the team for reasons other than a love of the water! Sakuma, however, had dreamed of coaching a synchronised swimming team, an ambition that was shattered when she was assigned to work at a boys school. She announces to the students that she plans to teach them synchronised swimming in spite of their gender. Most of the young men flee instantly.