Chocolat and the whole class are invited by Vanilla to a magic ocean after Vanilla and Chocolat decide to compete for a boy's heart. Chocolat saves Vanilla from drowning, but then starts sinking herself. Pierre, being the only one to notice, jumps into the ocean to save her. The two of them get trapped alone in an underwater cave. Pierre then becomes confused over his feelings for Chocolat. Is it love? Will Chocolat fall back in love with Pierre now that he isn't cold? Will they escape? They enter a space of memories and discover they knew each other in the past?