Twelve year old Osamu Hirano is in love with his classmate Rio, but he doesn’t have courage to confess his love to her. One day he learns that she is going out with Shuichi and this makes him very depressed. Shuichi is also a classmate, but unlike Osamu, he is very smart and also good at sports. Meanwhile, Osamu’s 21 year old sister Yumi, who years ago ran away to the big city of Nagoya, suddenly turns up with her fiancé, Kenji Yamaoka, a 45 year old ethnologist. Unsurprisingly, her parents have problems with Yumi’s choice of husband, particularly since he is the same age as her father and appears to have major health problems to boot. Yumi’s sudden reappearance, after years of silence, and her insistence on marrying a man more than twice her age, predictably throws the family into turmoil. Both Yumi and Osamu have problems addressing love, the deeper they fall into it, the more difficulty they have expressing their true feelings.