you can read the novel here: https://booktoki157.com/novel/1699728
but you need to translate it, when i read the google translated version i could still somewhat understand whats happening.
I only read up to chap 17, so the spoiler i put is all i know from the novel but i know for sure that Ilay and Taeui will are the endgame.
This entire part of manhwa is in chapter 9 called: "Sick"
so if you wanna continue this in the novel, start reading from the end of chapter 9