Rui, a mother who has been raising her only son, Kota, with financial difficulties. To save for the entrance exam fees, Rui starts working as a side job in the entertainment industry, but one day, a customer asks her for a sexual relationship in exchange for a large amount of money, and she agrees without thinking. Then, Kota happens to witness his mother's questionable behavior. Kota despises Rui, and from that moment on, he is unable to suppress the twisted feelings he has for Rui...