An ordinary day. A mother, Ayano, diligently attending to household chores. However, due to home renovations, the mother and son are staying at their aunt's house. The change in environment altered the forbidden master-servant relationship between the mother and her son. Forced into a physical relationship, the mother endures her son's tyrannical behavior as he meticulously checks her underwear every day. He even orders her to serve an unrelated neighbor who came by with community news. Reluctantly, the mother obeys her son's commands. The abnormal son watches this bizarre scene alone, smirking in satisfaction.
