Ok, I dropped after chapter 9. While the premise seems interesting, it quickly devolves into a simple step-dad trying to win the affection of step-daughter. The fact he is a demon lord plays almost no role in it. I didn't find it funny, and it quickly went to a slice of life, which I usually find boring. My biggest complaint is the fact that its differential doesn't make it different from a common slice of life, there is no long-standing conflict (the heroine doesn't accept him, but doesn't care much or tries anything to separate both).