Forgive me... The pitfalls of marriage between age and age

Despite the age difference, Kushi and Nana are a thrilling couple. Hisashi's nephew, Daiki, who has lost his job, is staying at the two of them. However, Nana is confused by the arrogant Daiki, who brings in her sex friend and intentionally shows her naked body. Eventually, when Daiki learns that Kushi is in the midst of an ending, he forcefully approaches Nana...