Sumire, who reveres her husband's older brother Ichiro like a real brother, would visit his house whenever she had the chance. One day, however, she entered an old storage room in the corner of the house and was locked inside. Before Sumire stood Ichiro with a cold expression. As a child, Ichiro had been locked in that same storage room by his mother as punishment, and he harbored both hatred and twisted affection for Sumire, who reminded him of his mother. He began to train Sumire within the confines of the storage room to vent these feelings.
