A story about a brother. The second son, Yasuhiro Inoue, and his mother, Ayako Inoue, are living with their aunt, Yukie Miyamae, who is their older sister, because their house is being remodeled. However, since it is not their own home, the sons of the Inoue family are somewhat restless. Her mother may be aware that she is still living on rent, but she does her best to do the housework without taking a break. And, while looking at his mother, Yasuhiro finally realized... And Yohei Inoue, the eldest son of an elite office worker who spends his days busy, also noticed... That her mother's bra is floating...
