NMO-012 - The son who witnessed his mother's affair snaps and forces himself on her

Chizuru, who raised her son Tomohiro alone after her husband's death, starts dating a man she met through volunteering. Seeing his mother act like a woman again makes Tomohiro feel strange. One day, he accidentally witnesses his mother performing oral sex on her new lover. Consumed by rage and jealousy at the sight of her being unfaithful in front of his late father's portrait, Tomohiro snaps and forces himself on her. As he overpowers her resistance and crosses the forbidden line, their relationship spirals into a dark, irreversible path.