After she woke up, a memory disappeared inexplicably.
So I don't know if I entered the Fourth Courtyard voluntarily or if I was forced to enter the Fourth Courtyard.
After finally escaping from that cage, she was ready to give up on retrieving her memory and plunge into a new life. At this time, a former classmate who she did not remember appeared in front of her.
Who is he? Why did you suddenly appear? Why couldn't she remember anything about him?