I May Have Overslept Too Much

The story begins with the last day of Rain playing Aegis, the most popular of all VRMMORPG where everything is possible. Our MC decided to play one last time before quitting the game, trying to slay the most powerful boss in the game. After an 18-hours struggle, exhaustion finally takes its toll in him and decided to rest. Unexpectedly when he woke up and opened the door something is different...