I sorry but I can't help but to comment this. The demon king and his "don't kill" bullshit is so fucking irritating, whoever tf it was in the past maybe the princess's past self was dumb af, every single of those heroines or mothers to make their potential lover/son promise "don't kill" are dumb as hell. If killing the bad and nastiest person who would not hesitate to harm thousands of people is a crime then they need brain to think. Not only because of this "don't kill" bullshit the demon king harmed himself but also got thousands of innocent demons/humans killed again and again when all this would have been avoided if he killed those bad people. It's very annoying atp.
I sorry but I can't help but to comment this. The demon king and his "don't kill" bullshit is so fucking irritating, whoever tf it was in the past maybe the princess's past self was dumb af, every single of those heroines or mothers to make their potential lover/son promise "don't kill" are dumb as hell. If killing the bad and nastiest person who would not hesitate to harm thousands of people is a crime then they need brain to think. Not only because of this "don't kill" bullshit the demon king harmed himself but also got thousands of innocent demons/humans killed again and again when all this would have been avoided if he killed those bad people. It's very annoying atp.