Ordinary salaryman Hamasaki Mitsuo works for a company which installs vending machines. He complains about his marriage life while at the dentist office. Mitsuo isn't happy at all with his marriage with his wife, Hoshino Yuka, who has the complete opposite personality from him. He doesn't know if he loves Yuka or not. At this time, Mitsuo meets Kono Akari, his ex-girlfriend from his university days, who is now married to Uehara Ryo..