Toki's twin sister passed away in an accident a year ago, and he's still struggling with the pain. However, with his parents away on a trip, he's now responsible for his nephew. The little boy hasn't uttered a word since losing both of his parents. Toki is doing his best to take care of him, but then Chihiro, his friend's younger sibling, steps in to lend a hand. Can these three individuals come together and form a makeshift family?