After a brief talk with Tsumugu, Manaka returns home and meets Hikari. Hikari reaffirms his feelings for her and she says she has something to tell him after the Ofunehiki. On the day of the ceremony, the rest of Shioshishio is about to hibernate while Hikari and his friends participate in the Ofunehiki. As the boats get started, Uroko-sama lights the way for them. Suddenly, the boats are surrounded by whirlpools and both Akari and Tsumugu fall into the sea. While Chisaki and Kaname dive to rescue Tsumugu, Manaka rescues Akari by offering herself as the sacrifice in place of Akari. Hikari rescues Akari but fails to save Manaka as the currents drive him away. Meanwhile the boat carrying Kaname, Chisaki and Tsumugu makes a fast maneuver to avoid a falling pillar, but Kaname falls in back into the sea. A strange barrier covers Shioshishio and Akari is found floating just offshore, but Manaka, Hikari, and Kaname do not return.