Mizuguchi Saki is a free-spirited, honest woman who works as an excellent editor of a fashion magazine. On the other hand, Obara Koichi is a serious ace member of an Air Self-Defense Force. The two with very different personalities got married immediately after a fateful encounter. It seemed to be a happy newlywed life but the couple had a huge quarrel after living in the same house due to their differences. The couple decides to plan for a divorce but keeping it a secret from everyone, including their co-workers, family, and friends.