Beyond Tomoebi.The children are taking swim class and the boys get hyped upon Chisaki's body. Hikari and Tsumugu decide to have a small competition but Hikari ends up crushing his toenail and Manaka rushes in quickly to assist him, leaving Chisaki once again ashamed that Manaka stood up for him ahead of her. Manaka tries to get Chisaki to accompany them to the infirmary, but Chisaki declines. Hikari gets frustrated not only for hurting himself, but for realizing that Tsumugu can swim faster than him on the surface. After classes, the children join together to rebuild the Ojoshi, joined later by Miuna, Sayu and the rest of the class. However, Chisaki leaves early after Manaka keeps trying to get Hikari and Chisaki closer together. Manaka catches up to Chisaki, but Chisaki reminds her that she wanted Manaka to forget about her liking Hikari. On her way back home, Manaka meets Tsumugu and reminisces about the day when she and her friends failed to witness the Tomoebi, a rare underwater natural phenomenon because it took too long for her to join them. Back at Shioshishio, Manaka witnesses the Tomoebi starting again and manages to call Chisaki to watch it with her, and taking Tsumugu's advice, she speaks her mind without hesitating to reconcile with her, but regretting that they could not watch it together with the boys, unaware that Hikari and Kaname are watching it too while overhearing them.