Introduction to the porn novel "Harde Academy" - On the busy streets, recently, some new personal transportation is often popular, equipped with motorcycle skateboards, roller shoes and unicycles.Its drivers are usually young people in their teens, rushing left and right on the crowded streets, and even dangerously.This time it was even more excessive. A wheelchair was rampant on the pedestrian road, and its speed was not as fast as an ordinary electric wheelchair.