A certain son's story. His son Yasuhiro Yabe and his mother Hisae Yabe are staying with his aunt Ikumi Kondo, who is his mother's older sister, for house renovation. His cousin, Tatsuo Kondo, who goes to university in Tokyo and lives alone, is renting a room at his parents' house. However, it's not my own house, so I'm somewhat restless. Her mother, Hisae, is also aware that she is still living on rent, and she does her best to do the housework without taking a break. And while watching Hisae like that, Yasuhiro finally noticed... That her mother's bra is floating...
