yjh did not in fact look like he was afraid of something for the first time supplementary stuff from yjh's pov in the novel:
“Dark Castle collapsed, like history disappearing. Kim Dokja was in there. He died there.
Yoo Joonghyuk stared while confirming the fact over and over again.
Kim Dokja was dead. How could such a thing happen? Yoo Joonghyuk was unfamiliar with not knowing.”
“Yoo Joonghyuk shook his head at Lee Gilyoung and Lee Hyunsung's cries. If there was a way to save Kim Dokja, he would've already done it. There was nothing he could do. It wasn't just him, it was everyone.”
“What if Yoo Joonghyuk went back and there was no Kim Dokja? Or what if Kim Dokja didn't act like this again?
Yoo Joonghyuk was afraid of something for the first time.”
“The choice that had always been possible was now irreversible. He met Kim Dokja in his third regression and they became companions. Then he lost Kim Dokja.”
lee jihye mention