Kaos and the other girls end up at the beach, solely because Koyume tells them, “Because it’s summer!” However, Koyume was the only one who brought a swimsuit, because she’s the only one who had the idea of actually having fun at the beach, so she takes them to the rental shop so they can all get swimsuits.

It’s now Christmas season. Kaos, Koyume, and the matron are all busy setting up the Christmas tree. Meanwhile, Ruki keeps walking back and forth in front of the dorm with a grim face for some reason...