Does anyone know where I can read it's novel? Does it have one?

Yes it does. Just wanna say, that this is chapter 86 (the last chapter updated so far) and you might have to go back. Hope it still helps you! :)

https://blossomtranslation.com/chapter/ydptb-chapter-86/

If anyone is wandering, chapter 19 here (webtoon) correlates to chapter 27-28 in the novel (⌒▽⌒)