This is a very funny, charming, and heartwarming anime centered around a specific gag. The "torture" scenes are very cute and every single character is incredibly likable. The show manages to span many different topics but is generally about being kind to each other (and yourself) and finding new family and friends in seemingly unlikely places. It's perfect as a pick-me-up anime and as a binge show. Some people might get tired of the repetition of the central gag (that the princess always caves under torture and gives up a secret) but I think each torture scene is varied enough to be entertaining. Later episodes alsobuck the formula for more slice-of-life style situations where the princess is just having fun with her new demon friends (even though we always return to her dungeon cell for more torture).