Sakura Manabe is a 16-year-old high school student and is living with her 12-year-old sister Momiji and 27-year-old sister Botan, who works to support the three of them. Their 19-year-old brother Kashiwa has been away at college for two years and has suddenly decided to come back to live with them. However, when Kashiwa arrives, Sakura and the...