Momoko, a mother, has been living with her son Yugo since divorcing her husband. Working hard on her own, Yugo has grown up healthy and become a student aiming to enter a top university. From now on, all her hard work will pay off, and once Yugo enters the workforce, a happy life will be waiting for him...or so it should be. In the summer, with Yugo's graduation coming up next year, Isshiki and his son meet with their homeroom teacher, Takimoto, for a career consultation. After a promising three-way meeting, Momoko is left alone in the classroom and is told that there is a problem with Yugo's further education...