Mizuki continues to navigate the predatory environment of his school, where the boundaries between students and teachers are dangerously blurred. After facing bullying from his peers and receiving cryptic advice from the school janitor, Mizuki decides to take a bold step by approaching the strict yet provocative swim coach, Nagasawa Asami. Under the guise of joining the swim team, Mizuki initiates a passionate and illicit encounter with Asami, further immersing himself in the school's web of hidden desires.