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.

Akari decides once and for all that she is going to live on the surface, and Hikari also leaves the house because he feels that Akari isn't being treated fairly.

Akari makes the decision to take Ojoshi-sama's place in the Ofunehiki and head into to marriage with Itaru like she was headed toward the Sea God. That was when the preparations to try to re-enact the first Ofunehiki went back under way.

Hikari thinks of Manaka while he's at home, and decides to tell her how he really feels about her. Manaka also tries to tell him something, but then tells him that she'll tell him as soon as the Ofunehiki is over.

Five years has passed since the Ofunehiki and Shioshishio's hibernation. Without knowing how Hikari or Manaka or any of the others are doing, now a 19 year old Chisaki goes to visit Tsumugu's grandfather in the hospital.