Emi is a beautiful wife who has been married to an elite working for a trading company for four years. She lives a modest but comfortable life in an apartment complex rented by the company. However, she feels increasingly lonely as her husband is obsessed with getting promoted and shows no interest in either his family or Emi. While she relieves her frustrations by masturbating, she is witnessed in a lewd act by a middle-aged man who has moved into the room next door. The two, who were never meant to meet, end up in a sweaty, passionate affair after being witnessed by the man.