Because of their Hamaji Junior High School closing, Umimura residents Sakishima Hikari, Mukaido Manaka, Hiradaira Chisaki, and Isaki Kaname are transfered to Mihama Junior High on the surface.

Because of Uroko-sama's curse, Manaka ends up with a fish face on her knee. It goes away the next day, but she has some regrets because Tsumugu had said it was pretty. Meanwhile, Hikari gets annoyed that Manaka and Tsumugu are talking and tells him to not concern himself with the people of Umimura.

Akari was rounded up by the older men of the village and Hikari and the others try to stop them. It's there that they first hear the rule that if you are seeing someone from the surface, you will be banished from the village. Hikari, unable to contain his rage, holds a guys-only meeting with Kaname. The girls are thrown out and go to another room, where Manaka finds a red-bellied sea slug. The sea slug is said to tell you the future if you tell it feelings you can't tell anyone else. It's then that Chisaki asks Manaka if she likes Tsumugu-kun...

Hikari finds out that Akari's boyfriend is in fact the father of the girl who had been picking fights with him, Miuna. Miuna asks him to help break the two apart. The next day, they are cooking in class and the Umimura kids are being isolated. Manaka works up the courage and tries to get the surface kids to try the food they made, but is greeted with an unfriendly response. Seeing that, Hikari jumps in...

Akari is able to tell Uroko-sama and her father how she feels about Itaru, and is starting to smile a little again. Hikari sees that and feels a little better and heads to school. While on their way to school, Chisaki is late and walking on her own.