第 4 集: 岩鸢游泳社在練習中面臨挑戰，並決定購買新的泳裝。
2013年7月25日 播出
The Iwatobi Swim Club has a full roster now. As they begin to practice, they run into a little trouble. After a certain member claims that his swimsuit is to blame, the club makes a trip to buy new swimsuits. (Source: Crunchyroll)