Okay so I just found out that Wonted is a sequel to a another webtoon. But what was the previous one about? I understand the "challenge", "best challenge", and the "webtoon" system, I just wont to know a little more information about this webtoon. The prequel summary, where to read the prequel, and any other information you guys have on this webtoon. Thank you very much, in advance.

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She says "yada!" but we all know she doesn't mean it.

Erm, in the description it says: "The second arc - Wonted Cacophony- is the official 'Wonted' set six years later." So the one you linked is the one set 6 years before Wonted Cacophony and is the one that tells the past of the two main characters (as it says in the description)

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d: Allow me to explain.

When Wonted was a best challenge series, it was basically like Wonted Cacophony but after being moved to the Webtoon section, Lucks decided to change the entire beginning of Wonted into the past of Kae and Hee-Oong. Think of the first 20 chapters as a looong prologue.
There's no sequel or prequel, it's just one series on its second arc.
Yeah it's a bit confusing.

I guess I understand a little better, thanks! I'll continue reading.

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She says "yada!" but we all know she doesn't mean it.