Honestly I’m rooting for the demon queen, it sounds like she took over peacefully and implemented a bunch of welcome reforms that helped the people out, and then blue hair girl and mizuki just show up and start murdering her childhood friends
This is a pretty well written story, I really like the character dynamic between Fujiwara and Yuri. The author themselves said "I like when it's true but not confirmed" about yuri so that should give you an idea of what to expect from it.
The sadistic honors student and pure delinquent is a...