I almost forgot W was still tagged as Romance after all, so it should really end with Chul and Yeon Joo. I was too stoked for understanding the travelling of the characters between the two worlds lol.

But, I just appreciate how they cleaned up the ending of Chul's world, I really like the touch with paradox.

"Contrary to how the webtoon was ended, it was not really a sad ending." Oh Sang Moo was the true genius at this point. He literally cut the ties of the portal between the two worlds by neatly concluding his masterpiece-W.

He also did not break the laws of the two worlds because in exchange of Chul's real life existence, he made use of his webtoon existence as the killer—and ceased as a real world Oh Sang Moo.

Lastly, the paradox I was saying that I like, was about how the plot falls to its ending the moment the villains cease. That's why Oh Sang Moo has to kill Han Cheol Ho to resolve the conflict of the story. Beautiful touch for showing a plot's denouement.

So in the end, the story finale of W in the real world was like Oh Sang Moo's gift to Yeon Joo. Neat.

PS. I've seen this already a few years back, but it confused the hell out of me. It's just now that I decided to rewatch the series that I totally understood the "science" of the two worlds.