Manami, a married woman, carries a deep inner darkness rooted in a promise made with her former lover, Kenji. Kenji, who had vowed to marry her, left after his family's bankruptcy, promising to return and asking her to wait for him—unwilling to burden her with his misfortune. Unable to honor that promise, Manami married her current husband and began a new life. Yet that past continues to haunt her, binding her with heavy guilt and unrelenting regret.