Mo Nan, an Imperial Preceptor in the Celestial Realm, has returned to his senior high days. To his surprise, there is a dragon within him… What would a powerless person do in the face of bullies: fight or obey them? In his past life, Mo Nan did not fight. But he will not make the same mistake! The distinguished Imperial Preceptor lives his new life at will in the modern world while holding onto one principle: a ruler does not serve one!