Thirty-one-year-old Mitsuko (Non) is, on the surface, enjoying her solo life. She cooks for herself, dines on her own, goes to the spa alone, and visits her friend in Italy all by herself. But she is not as alone as you may think. She has her own adviser in her head with whom she often holds conversations: ‘A’ (voiced by Tomoya Nakamura). A provides Mitsuko with answers when she feels insecure. It seemed that her peaceful single life with A will continue unchanged until she falls in love with Tada (Kento Hayashi), a young salesman. Mitsuko decides to take a step forward together with her inner A. Will she be able to break out of her comfort zone of being alone?