In the middle of my forties, I married my childhood friend, my younger wife. My wife doesn't accept my night life because she's busy with work, contrary to me who is eager to make her boyfriend. She was abandoned that she would endure for a month at the end. And a month later, I couldn't have sex with her wife, so I went home to celebrate her sister-in-law, Ichika's enrollment. While spending time suppressing the sexual desire that seems to explode, one of my sister-in-law approached me many times with a fearless smile.