After her husband's death, Tako supported the construction company single-handedly. Her only son, Ichiro, also worked hard as his successor, but eventually, the company couldn't keep going... One snowy night, the electricity was cut off, and the two of them had no warmth. They huddled together to keep each other warm. Ichiro then tightly embraced her, saying, "I will protect you, Mother..." Seeking solace in each other's warmth, the mother and son. Before long, they removed their clothes and pressed their bodies tightly together, their lips meeting...