Manami takes Hime-chan and Icchan to a swimsuit store. They go in and each of them quickly picks up the swimsuit they like. At Hime-chan's home, Father shows them some entrance tickets he got for the amusement park where he plans to take his family the next day. Later in her room, Hime-chan tells Pokota that she is confronted with a dilemma: she wants to go with her friends to the Waterland (superbig swimming pools). Hime-chan splits herself and sends Hime-copy with her father and Yumeko to the amusement park.
水着を買ってハワイへ行こう！お店の福引で招待券が当たった姫子や大地たちはプールへ行くことに。先約があった姫子は分身して…。
