The long-awaited third collaboration between popular author Kuroneko Smith! My aunt Kyoko and nephew Kohei end up having a physical relationship. Continuing to accept endless sexual desire, creampie, pregnancy, and childbirth. About a year later... Kohei visits his girlfriend's aunt's house for the first time in a while. Kyoko is more beautiful and full of sex appeal, and Yukihira's lust is at its limit. She continues to press for a relationship, but Kyoko, who has become her mother, refuses and asks her nephew to forget about her past.