Max Level Returner

Read Manhwa Max Level Returner:

Globally, 120 million people have vanished.
[Activation of the ‘Return’ Final Quest Completion Reward]
Yoon Sang-Hyuk defeated the worst survival game ever created for the first time in 22 years. He has returned, claiming to be the strongest player out there and possessing every prize item—even the ones that no one else could obtain.
[Return of the Monarch in Mask]
I am the only one who has reached level 10,000 and has every item!