Is It Collapse or Destruction?

The person in front of me is so familiar. He calls himself the administrator of the world and asks me to take his place before "this person" wakes up. He promises that he will let me return to my world and realize my wish afterwards. But why can't I remember the past, who is in the frozen coffin, and where should I go... This novel and its characters are purely fictitious. Any similarity is purely coincidental and should not be imitated.