Kazuo, a longtime part-time worker, finds a girlfriend, Toshie, a nurse, and then lands a job at a real estate company. He plans to invite his mother to Tokyo to introduce her to Toshie. However, he witnesses Toshie cheating on him with the company president, and after breaking up with her, he quits his job. Feeling distraught, Kazuo enters the bar Himawari, where he is captivated by the hostess Mikayo. With a carefree expression and a constant smile, she is like an angel. However, Mikayo has a mild intellectual disability, and the bar's owner, Akemi, quietly supports her, but...