As a solution to the declining birthrate, the government has introduced the “Trial Marriage Policy,” in which an AI selects the perfect match for a couple. Maho, who has a physical relationship with Fumiya but is not sure if they are in a relationship, uses the “trial marriage policy” on the spur of the moment when he is cold to her, and ends up spending three months as a married couple with Kengo, whom she met there.....!? The two are married for three months, but which one will truly make her happy, the one decided by AI or the one chosen by her instincts? What will Maho's fate be after 3 months?