第 10 集: 美島在游泳練習中難以集中精神，而美春則開始無故缺課。
2017年9月15日 播出
Mishima has been unable to focus during swim practice since the new semester started. Though his relationship with Miharu has returned to normal, he still feels as though something is lacking. Meanwhile, Miharu begins missing school for some reason. Mishima is worried but unable to get in touch with her... (Source: Crunchyroll)