Kenji was born as the second son of three siblings. - From his mother Rin, he had the impression that he was quiet and shy... - 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 Rin begin living together. - The lively house is quiet and Rin feels a sense of loss... - Kenji feels the frustration and emptiness of worrying about his mother's siblings, and tries to accept his mother's love for himself...