Since the death of her husband, Yuuka has been raising her son, Yugo, on her own. She worked hard with only her own hands, and her son grew up healthy and became a student aiming for a top university. She thought that from now on, her hard work would pay off, and a happy life awaited her son once he became a working adult... But that wasn't the case. The following summer, as Yugo's graduation neared, his mother and his homeroom teacher, Oshima, had a meeting to discuss his future. After a successful three-way meeting, Yuuka was left alone in the classroom and was told, "There's a problem with Yugo's university application..."