Makoto and Kyouichi are on their way to the sea for a holiday job at the Marine House Nitta, run by Chiharu`s older cousin Daisuke. At the inn they are welcomed by a shy but beautiful girl who turns out to be Chiharu`s cousin Nao. Makoto is trying to have a go on her, only to learn how jealous Daisuke can become. Burning hanabi at night, Aki and Yumi tell the boys about Nao`s frail health - that`s why she is always alone and hiding from the sun. On the next day Nao walks to the beach with her parasol - and Yumi and Aki meet her just in time to see her fainting.