The Edge of the Ancient Sword

After Ling Duan wakes up, everything feels wrong. First, the junior brother he loves most is as cold as ice toward him. Then, for some inexplicable reason, he becomes the disciple of the Elder of Discipline. Apparently, something went wrong while he was riding his sword. But that mistake was far too serious. Anyway, he's sure that he isn't the one who's wrong. The world is! P.S. Ling Duan is an adorable second senior brother from another world.