@BlaBlaBlaBish
Spoiler!
yoohyun a Lil bit shock when he know yoojin regressed to save him but he is happy because of that reason. The thing is yoojin only tell yoohyun a Part of it and yoohyun didnt know that their relationship worsen in the past timeline. He thought they both are ok so thats why his reaction is kinda ok bcz he thought yoojin really regressed to save him and they both were good in the past😭 in any way, yoojin still yoojin and he chose to kept it a secret bcz he dont want to hurt yoohyun. He want that this time, they both are sound and safe. its way too heart breaking in the novel btw. So much depth in this DOOMED SIBLINGS