Yui, a widow who lost her husband in an accident and lived with her child, Shota, as soon as she got married. Shota, who spends his time supporting his mother-in-law who is injured, cannot control the inferiority that comforts himself in front of the deceased at midnight. From loneliness, Yui accepted that desire and the two distorted newlyweds began. However, such a life could not go well and the end suddenly came. One day, Shota finds a letter from his father's altar to Yui. What was written there ...