Yusuke is an orphaned high school student whose tardiness put a girl on lap! Rouge, the mysterious girl who fell from the sky, suffers from amnesia and remembers nothing except her name. Ever the gentleman, Yusuke offers her a place to stay until she recovers her memory. After spending many days playing, shopping, and falling in love, Yusuke suddenly encounters two women, Kaige and Meige, who claim to be Rouge\'s royal sisters. Enemies of the royal family also wish to capture Rouge. Will these two lovers be able to stay together?