After her husband passed away, Touko single-handedly supported the construction company. Her only son, Ichiro, also worked hard as his successor, but the company eventually went under... Then, on a snowy night, the electricity was cut off and the two, unable to stay warm, huddled together to keep each other warm. Ichiro then hugged her tightly, saying, "I'll protect you, Mom..." Mother and son sought solace in each other's warmth. Before they knew it, they had taken off their clothes, and their lips were pressed together as their skin pressed tightly against each other's.