Nagi No Asukara (dub) Episode 13 -

The episode follows the village of Shioshishio as its residents prepare for a period of hibernation while the surface-dwelling and sea-dwelling humans collaborate for the ceremony.

During the ceremony, intended to appease the Sea God, massive whirlpools erupt. Akari and Tsumugu are swept into the sea. Nagi no Asukara (Dub) Episode 13

Manaka rescues Akari but realizes the Sea God requires a sacrifice. She offers herself in Akari's place and is dragged into the depths, leaving Hikari unable to reach her. The episode follows the village of Shioshishio as

Watch the dramatic turning point of the Ofunehiki ceremony in this clip from episode 13: Manaka rescues Akari but realizes the Sea God

Before the ceremony, Hikari reaffirms his feelings for Manaka, who promises to tell him something important once the event concludes.

The episode is widely regarded as one of the best in the series due to its "perfectly crafted" emotional weight and the way it subverts the expectation of a peaceful resolution to the ceremony.