After her husband's death, Yuka and her son, Yugo, have been raising each other alone. She single-handedly supports the family, working tirelessly to ensure Yugo's healthy growth and his potential admission to a top university. The future seemed to hold the fruits of their labor; once Yugo entered the workforce, a happy life awaited them... or at least that's how it should have been. In the summer, as Yugo prepares to graduate next year, after a consultation with his homeroom teacher, Oshima, Yuka leaves the Mizuno mother and son alone in the classroom and tells them, "There are some questions about Yugo's university application..."