There is no extra fee for a junior student 15 years or older to register alone.
According to aviation law, a 15-year-old can fly alone, so there is no problem with school registration. However, because juniors are still minors, they must share a room with a school employee, manager, or staff member.
Students must have perfect attendance, complete homework diligently, and cannot smoke or drink. Juniors are only allowed to go out with an escort.