Yui, a widow who lost her husband in an accident soon after getting married and lived with her stepchild, Shota. Shota, who spends his time supporting her heartbroken mother-in-law, is unable to suppress the inferiority that wells up in Yui who comforts himself in front of her portrait late at night. Because of her loneliness, Yui also accepted her desires, and their distorted newlywed life began. However, such a life could not go well and the end came suddenly. One day, Shota finds a letter Yui addressed to her father from her father's Buddhist altar. What is written there...
