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.
You will all give your hearts 
for the sake of humani.
ستقدّمون قلوبكم جميعاً لأجل البشريّة
Ihr werdet eure Herzen für
die Menschheit opf…
¡Entreguen sus corazones
por el bien de la humanidad!
¡Entregad vuestro corazón
por el bien de la humanidad!
Je vais vous demander d’offrir
votre cœur pour le bien de l’humanité.
Voi tutti donerete i vostri cuori
per la salvezza dell'umani.
Quero que ofereçam seus corações
pelo bem da humanida.
Каждому из вас придётся отдать
свою душу ради спасения человеч.