That was a good end.
The couples were easy to predict, no unnecessary love drama.
I do agree that the plot took a wild turn into some sort of high schoolers vs gangsters thriller, but I'd be lying if I say I didn't enjoy it. I didn't like how the author retconned Park's character. First, he was supposed to be this evil yakuza, but then he turned into a tragic hero that Hobin foolishly went after.
Also, the arc after they defeated the first time wasn't as entertaining as the ones before. But still, I had a good time reading it, nonetheless.
I don't regret reading this one at all. Not a big fan of Korean manhwa, but this is one that I would definitely recommend to other people.