Drama series depicts the love and marriage of two 30 something couples.

Ordinary salaryman Kousei works for a company which installs vending machines. He complains about his marriage life while at the dentist office. Kousei doesn't do his job well and he is also sick. He isn't happy at all. His biggest problem is his wife Yuna, who has the complete opposite personality from Kousei .They have been married 2 years.

Yuna is bright and easy-going. Kousei doesn't know if he loves Yuna or not, but he thinks her personality meshi with his. At this time, Kousei meets Akari, his ex-girlfriend from his university days. Akari works as an assistant at the College of Fine Arts and married Ryo .