The Second years are preparing for a class trip to Hawaii. Meanwhile, Tomo and Misao attend a party hosted by Reishirou in memory of the anniversary of Aine's death. The party also features a very unusual performance competition in which everyone from Rikka to Takatsuki takes part and which Tomo and Misao end up winning.

Tomo, Takatsuki, Misao, An and Higuchi are all enjoying a working vacation at the beach but it isn't long before Tomo manages to upset Misao. Meanwhile, Shuri and Ania are investigating the ruins on a nearby island. However, it seems that Kagakagari and Kristina are also interested in them, as is Kyomu Satomi and the First Student Council.