Adapted from the novel of the same name by Lisa Wataya, it tells the story of a 31-year-old single woman, Mitsuko Kuroda, who has a consulting character "A" in her mind. When she is confused about interpersonal relationships and behavior, the other self "A" always gives her the right answer. One day, Mitsuko fell in love with Tada, a salesperson younger than herself, and believed that Tada and herself were in love. Mitsuko, who had been accustomed to living alone, could not be brave like she was in her 20s. While confusing herself, she took a step forward. This film is the first collaboration between Rena Nounen and Kento Hayashi, and it will be released in winter 2020.