Max Level Returner

120 million people have disappeared worldwide.
[Final Quest Completion Reward: ‘Return’ Activated]
For the first time in 22 years, Yoon Sang-Hyuk cleared the world’s worst survival game.
He, the so-called strongest person among all other players, one who possess all reward items even the ones that no one else could earn, has come back.
[Return of the Masked Monarch]
I alone am level 10,000, I alone have all the items, only me!