Nagi-Asu: A Lull in the Sea

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...