Kitayama Chika is a salesperson of an apparel shop who recently married Satoru, a manga artist assistant. Despite their very different personalities, Chika and Satoru enjoy their lives a lot as newlyweds, but they slowly noticed many strange changes, such as the house getting messier day by day. One day, Chika was dismissed from her job and was wondering why she couldn't do things well. She decided to get tested and found out that she has a "developmental disorder" in which the symptoms are very similar to what she has been experiencing. After hearing the result, Chika and Satoru decide to take unexpected actions while being watched over by the people around them.