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.

The day of the Tomoebi, a Hikari who hasn't aged from five years ago, appears in front of Miuna and Tsumugu. He has no memory of what happened since the Ofunehiki, but seems healthy and starts living at the Shiodome household.

Hikari starts back at Hama Junior High and is in the same class as Miuna and Sayu. He fits right in instantly, making the class laugh and has his old teacher back. But Miuna and Sayu can't help but feel that the situation is weird.

Akari tells Hikari and Miuna that she was just informed that Kaname has woken up from his hibernation. They all hurry down to the Fishery Cooperative and find that just like Hikari, Kaname hasn't aged at all. Chisaki and Tsumugu also rush down to see him, but Kaname sees them together and doesn't know how to feel.

Hikari and the others find Manaka asleep within the graveyard of Ojoshisamas. They manage to bring Manaka, who is losing her Ena, safely to the surface and to the Shiodome household, but she is still asleep. Afterwards, they have a doctor examine her and are relieved to find out that other than losing her Ena, she seems to be fine.

After finding Manaka in the graveyard of Ojoshisamas, Hikari and the others bring her back up to the surface. They think that she will wake up soon just like Hikari and Kaname did, but even after a week, there is no sign of her waking up. Hikari, Kaname, and Chisaki go to Shioshishio in hopes of finding a clue to waking Manaka up.

While Hikari and Miuna are arguing, Manaka suddenly wakes up. Hikari and Miuna are obviously surprised, but Manaka acts like nothing has changed is all smiles. Other than not knowing why her Ena suddenly disappeared, she seemed perfectly fine and it's decided that she will be staying at Itaru's house as well.

Tsumugu talks about Uroko-sama and ends up with the curse fish on his arm. This makes Hikari and the others realize that Uroko-sama is not in the sea, but on land. To find out what's going on with everyone in Shioshishio, what's going to happen to the surface, and about Manaka who's lost her Ena, everyone looks for Uroko-sama.

Uroko-sama tells Hikari and Miuna that Manaka has lost the heart to fall in love with anyone. Hikari tries desperately to find a way to turn Manaka back to normal, and has a hard time facing her because of that. Hikari and Miuna decide to talk to Chisaki, Kaname, Tsumugu, and Sayu about the situation because that's how they've always solved things.

Tsumugu dives into the sea after Chisaki. He starts having trouble breathing and is about to lose consciousness, but then suddenly gains Ena. Tsumugu finally catches up to Chisaki and lets her know his feelings while they're in Shioshishio. Chisaki cries and runs away.

To stall the saltflake snow and try to get Manaka's feelings back, Hikari and the others decide to do another Ofunehiki. The day before the festival, after hearing that the red sea slug pendant has Manaka's feelings in it, Akira takes it and accidentally drops it into the sea.

In order to save Manaka, Miuna is swallowed up by the whirpool that Ojoshi-sama made and is covered in Ena that wraps around her like a cocoon. Hikari and Tsumugu go to save her but are held back by the powers of a god.