The Nishino couple moved to a new neighborhood seeking a better living environment, hoping it would help with their plans for pregnancy and future stability. Their neighbor seemed friendly and helpful, always sharing useful local information. However, Emi Nishino struggled with unsatisfying sex with her husband, leading her to spend each day masturbating alone. One day, the neighbor mentioned hearing strange sounds coming from their home, causing the couple to worry—were they being noticed? But the truth behind those sounds was far more unexpected than they imagined.