Responses

yes he did find out. he also noticed that he couldn't do some action that gets him closer to heewun because the author of the novel forbade it (he was going to greet heewun but couldn't say anything). but he asked heewun if he knew about the novel and how much he knew. SPOILER he also told heewun that the coffee shop dude was the shaman who told him to move to this neighborhood
Spoiler maybe?
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In chapter 26 does the best friend find out that he’s been a character in a book? Kind of lost in this chapter. I don’t speak/read Korean so yeah.