Ep. 4: Sasami and Noumi discover strange occurrences during swim class that cause them distress

4

During a routine swim class, Sasami and Noumi notice unusual events taking place around them. As they investigate the situation further, they uncover the reason behind the strange behavior. Upon realizing what is actually happening, both characters become visibly upset by the discovery. The episode focuses on their reaction to these unexpected circumstances within the swimming lesson context.