Panic on the Shore!.Kösaku and Hibari's class are going to the beach. Hibari goes bikini shopping but Kaori arrives and steals a swimsuit Hibari wanted. As revenge Hibari collapses the changing room walls, exposing Kaori's breasts in public. Hibari decides to borrow Tsubame's bikini, only when Tsubame steals it back, leaving Hibari half-naked, Ibari is parentally outraged but has another heart attack when he realises he treated Hibari like a real girl. Kaori plans to get revenge by stripping Hibari naked at the beach. As Hibari goes swimming Kaori's delinquents dress as a shark to steal her bikini but are scared off by a real shark, though not before shooting it with a harpoon...