He thinks it must be a dream when he discovers that his mischievous girlfriend Ririka and his serious, dependable lover on the side Ui are sisters—and both confront him at once. Each insists that her bare pussy feels better, and they demand that he choose by cumming inside. It soon becomes clear that this is no dream. Caught between two stunning, slim, big-titted sisters competing for his cock, he plunges into a chaotic harem packed with repeated creampies and calls it the happiest romantic disaster in the world.