The students get together in their swimsuits for swimming class. The sea kids are still getting used to school on land, but are starting to get along with the other kids. The teacher mentions that he's going to be timing them today and as the kids groan in response, Hikari and Tsumugu's rivalry fires up.
Natsuki Hanae
Hikari Sakishima (voice)
Kana Hanazawa
Manaka Mukaido (voice)
Ai Kayano
Chisaki Hiradaira (voice)
Ryota Osaka
Kaname Isaki (voice)
Kaito Ishikawa
Tsumugu Kihara (voice)
Mikako Komatsu
Miuna Shiodome (voice)
Kaori Ishihara
Sayu Hisanuma (voice)
Kaori Nazuka
Akari Sakishima (voice)
Junji Majima
Itaru Shiodome (voice)
Motomu Kiyokawa
Isamu Kihara (voice)
Yoshitsugu Matsuoka
Shun Sayama (voice)
Shinji Kawada
Satoru Mihashi (voice)
Kohsuke Toriumi
Uroko (Uroko-sama) (voice)
Masuo Amada
Tomoru Sakishima (voice)
