|The Tradition of the Sea|
|Umi no Ītsutae|
|Japanese Air Date|
October 17, 2013
|Opening||lull~And We Are~|
|← The Chilly Desert||Because We're Friends →|
Akari's arms were caught and brought off by the sea villagers.
Hikari and his friends tried to stop them, but the sea villagers introduced them to the law of "marrying human from surface meant the sea villager should be exiled from sea."
Hikari went out of control and won't hear Chisaki and others, Kaname then start a council of war with other guys.
Manaka and Chisaki went cornered. Then, Manaka found a sea snail with a red stomach.
She show the feelings she is yet to tell anyone towards the red sea snail.
On that moment, Chisaki asked Manaka, "Do you love Tsumugi-kun?"……。
- Akari Sakishima
- Tomoru Sakishima
- Uroko sama
- Hikari Sakishima
- Manaka Mukaido
- Chisaki Hiradaira
- Kaname Isaki
- Homeroom Teacher