@Kamelpov
The music video? No, it's in Korean. And while it does contain images of the following several volumes, they don't spoil anything plot-related besides the fact that some new characters exist.
It's an interesting song, mixing pop music with the traditional Korean style. Here's the link if you're interested.
https://www.youtube.com/watch?v=np-QZPJx0ZQ&t=57s
I suppose that is one way to make someone grow a spine, although I feel it should be pointed out that such a method is rather likely to backfire. Maybe not the smartest super old ghost.
@phil777 Then trust me, you're going to love the next few chapters. I'm entirely serious. It shows some of the best writing in the series, and what this series COULD have been.
@Mitsuboshi The author kinda strays away from the whole lolicon premise thing in the next few volumes and actually tries to world build. It's friggin great.