Onizuka's Summer Vacation Lesson! Dream Unfulfilled!? Poor Girl's Aim to be a Singer Opposed by Mother

Videos of a mysterious female singer are becoming popular. The class becomes excited when they realize it's their fellow student Hiiragi. Hiiragi is the oldest of four siblings who lost their father at a young age, and has taken care of the children while her mother works. She tries out for an audition to become a professional singer, but her mother is opposed to it.