As her reward for completing the quest, Tokitate gets to ask the Game Master whether this alternate world is actually virtual or not... and the answer is that it's an alternate Earth that branched off of the original Earth's timeline. Upon hearing that it's an existing world, Yotsuya trembles with the realization that he killed real people. Once he returns to the real world and resumes his normal life, the Game Master appears before him in the form of a young girl and leads him to a meeting with the next new player.
Who do you think has been keeping 
you alive all this time?!
من مكّنك من العيش حتّى الآن برأيك؟
Was glaubst du, wer dich die ganze Zeit
am Leben gehalten hat?!
Chi credi ti abbia permesso di sopravvivere
 per tutto questo tempo?
Quem você pensa que te manteve vivo
esse tempo todo?
Ты подумай, благодаря
кому вы до сих пор живы!