@neutaaa9Star sure, sry I'm to tired for long explanation about the next chapter 23 but for short:
Spoiler!
Seonwoo Yeon will tell him that he comes from another dimension and that this world is all just a game in his world. Also that Seonwoo knows that he is a regressor (or how you write it) and what it means. Jehee Lee asks for more details. So on, more I don't remember right now. Sry😅
@AnnoXxCel0 writing again as I did little research. The English Novel On: https://de.scribd.com/document/771768928/Creating-Hidden-Endings You find the novel of it, but it's in page form and couldn't find the page where the manhwa in English is right now. After page 80 or like that I believe. Hope you find it.