Winner of the 18th Shosetsu Subaru Newcomer Award. Centered on a brother and sister living apart after their parents divorce, the novel follows the perfectionist older sister Sono, her younger brother Yuki who is physically frail and emotionally guarded, their separate romances, and the days surrounding their bedridden dog Haru. It is a coming-of-age story that carefully traces family distance and the subtle shifts of the heart.

With their bedridden dog Haru at the center, the distance between the siblings gradually begins to change.