After her parents' divorce, Kotori settles into a quiet life alone with her father Naoto, her admiration for him slowly deepening into more complicated emotions as she considers her place in his world. Naoto wrestles with his own conflicting feelings and seeks discreet ways to manage them while protecting their bond. Kotori's shy friend Rina, usually content to stay in the background, surprises everyone by approaching Naoto directly and revealing an unexpected side of herself that shifts the balance among the three.