The story of a son. Because of home renovations, the son and his mother temporarily stayed at their aunt's house. Meanwhile, his cousin, who was studying at university in Tokyo and lived alone, rented a room in his hometown. Even so, he felt uneasy not living in his own home. Perhaps his mother also felt uncomfortable living with others, as she always worked tirelessly, helping with housework without rest... While he was paying close attention to his mother, he finally noticed something... her bra was askew...