The whole family has left the nest, spending incest with their mother in their parents' house.

Kenji was born to the second son of three brothers. From her mother, Miki, I got the impression that she was a child that was hard to handle... One spring of the year, my older brother got a job and lived alone, and my younger brother entered a boarding school. His father is on a single business trip, and his life changes rapidly, and Kenji and Miki begin living together as a mother and child. The lively house suddenly becomes quiet, and Miki feels a sense of loss... Kenji feels the frustration and emptiness of worrying about his mother's siblings, and tries to feel the love of his mother in his own way...