All performers portray adults. Now in my mid-forties, I am married to a younger childhood friend. I am eager to have children, but my busy wife refuses sex and finally promises to give in if I can wait an entire month. Thirty days later, that promise remains unfulfilled when I travel home to celebrate my sister-in-law Ichika's marriage registration. As I struggle to contain a month's worth of pent-up desire, Ichika repeatedly approaches me with a provocative smile.