Responses
The novel and manhwa are really different. If you were to read the light novel from where we are now in the manhwa you would get really confused. The plots are completely different and are developing differently. I would recommend to just read the whole novel from the beginning or else the novel just won’t make sense. But if you do want to read the novel from where we are in manhwa then it is around chapter 62.
(Here is the link for the novel)
https://www.lightnovelpub.com/novel/the-beginning-after-the-end-novel-24041419/chapter-61
!!!MAJOR SPOILER ADVICE!!!
(I'm not responsible for you clicking and reading it! It's a BIG spoiler!)
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Okay Kai is a traitor, MC is going to prison for killing Lucas, Granny Godsky dies, and Arthur tells his parents that he was a king in the past life and that he's been an adult in a body of a child all along just because he feels like it (their reaction isn't good by the way). There's more but I'll tell it later.