I'm Back from League of Legends

"S-class Death Song Hero Tomb?" "Fortunately, I know a lot of world-banned songs!" Qin Yingxiong, who returned from the world of League of Legends, discovered that this game was far more than what he saw. The secret realm of the Hero Tomb, the mysterious medal, the death mission... Between the transitions between reality and the secret realm, Can he find his own secret?