In my mid-forties, I married my childhood friend, my younger wife. My wife does not accept nightlife because she is busy with work, on the contrary, I am impatient and want to have children. Finally, I was told that I would try to endure it for a month. And a month later, I couldn't have sex with my wife, so I went home to celebrate my sister-in-law, Ichika's admission. While I was spending time suppressing my seemingly explosive sexual desire, one of my sisters-in-law approached me several times with a fearless smile.