It's been a full year since eccentric loner Mei Tachibana set out onto the seas of love with the self-assured Yamato Kurosawa, but there's a storm ahead Yamato's friend Kai has confessed his feelings for Mei. Will it sow the seeds of doubt, or just deepen her affection for Yamato? Meanwhile, Megumi's scheming forces her into greater and greater social isolation. With all this churning in the background, what'll happen when Mei and Yamato leave for an overnight anniversary trip?