Aki (Kagura) has to take care of her nephew Takuya because of her older sister's overseas assignment. The young nephew's free-spirited personality was refreshing to the rutted couple's life. One day in Takuya's room, he sees tissue waste after masturbating. Feeling a man in her nephew, Aki can no longer control her urges. After that, Aki loses herself in a 3P with Takuya's friends and becomes captivated by the pleasure.
