I didn't understand the plot

The storyline was all over the place and to be honest I didn't understand this series at all. Especially the end, what the heck was that. Sure some NC scenes were good but to many different characters with the plot. It didn't make sense. Like the two boys being friends. The one painter and that boy little they had nothing relevant to the story. Plus that crazy girl trying to rape tar/foam and then killing the manager. Everything was a mess. Not likely to watch it again.