Hotaru Kusakari, who works as a pharmacist at a drugstore, and Goro, a post office clerk, are a couple who have been married for two and a half years. However, their love is limited to the beginning of their marriage. Due to different living habits and values, the two began to quarrel over trivial matters and were already facing the crisis of divorce. In fact, Hotaru and Goro each have a "back face" that they must never tell anyone. Hotaru is a Koga ninja, and Goro is an Iga ninja. Both are descendants of rival ninjas who have been hostile to each other on the back of Japanese history. At this time, Hotaru received an order to get hold of the scandal of Akamaki Shosuke, a member of the ruling Civil Party. On the other hand, Akamaki, who noticed the suspicious movements around him, secretly entrusted the Iga clan to protect him. @哦撸马（阿点）