Since her husband was widowed, her mother, Yuka, has been living with her son, Yugo. Yugo worked hard with only one woman's hands and grew up healthy and became a student who could aim for a top university. From now on, the hard work will be rewarded, and if Yugo becomes a member of society, a happy life will only await him ... It should have been. In the summer before Yugo's graduation next year, Mizuno and his family have a career consultation with their homeroom teacher, Oshima. After an auspicious three-way interview, Yuka, who was left alone in the classroom, was told that there was a problem with Yugo's going to school.