I can't entirely call this a comedy manga but it's a fun combination of fluffy and comedy. Here we see the everyday life of the kishimoto family and their antics together with their pet... an effing demon lord... maou! it's so out of this world and the way they react all `casual about it is hilarious. The combination of supernatural and slice of life is seamless. I would have wanted maou to go back to his original appearance (instead of staying in his growth spurt version) when his biggest worry was resolved in the end tho. He's so cute. But he's not bad looking with his grown-up version tho.
Uchi no Maou Kamimasen yo