must warn that the angst arc is a pretty long one though
also if you have questions or are curious about anything, people have sent the novel link multiple times in the topics, I have one as well, please go read or at least skim it, and if it's still not for you that's 100% fine. im just tired of people who haven't read a single bit of the novel playing the telephone game and spreading misinfo

from what I've seen, every manhwa chapter is about 3 novel chapters. chae-woo shows signs of regaining his memory at chapter 92, he slips back into his vegetative state at chapter 113, regains his memories at about 119 or so. for about fifteen chapters after that he has his memories back but doesn't show any sign of them, at least not to lee-yeon so his behavior is kinda like normal. I see a lot of people bring up chapter 122, and from what I can see in the translation, it was a nightmare sequence and not his actual behavior.
around 140~ is when things start to go south. (150 is uncomfortable to read, but after that I'm not super sure) that's about fifty or sixty chapters, meaning those novel chapters translate into about 10~20 manhwa chapters. he confronts her at chapter 157.
so to everyone who is super worried about upcoming angst, it's not for another like, minimum ten chapters. (chapter 52 and 53 are chapters 82~84 in the novel)