I dug into it for a long time, I was afraid that it would be cheap, especially when it comes to effects. Well, I was terribly wrong again. The effects are great, of course we don't avoid the classics (flying), but it's very limited. Otherwise, there are great fights and the aforementioned effects are also very nice. But what makes this series special are the characters and the story. The characters do not have a single flaw and the story is original, well-entangled and exciting. Even so much so that after a very long time I couldn't wait for the next part and watched until late at night. The main two are incredibly likable and their relationship softened me to an excellent degree. The chemistry between them shines and the actress who played Mud-eok is perfect. Her transitions from Naks to maid are worth it. The creators know how to perfectly combine comedy and drama. There are a lot of really funny scenes where you can really laugh, but it's not a problem to toughen up. Too bad they didn't make more room for the main characters after they finally got closer. Sometimes Koreans annoy me, that in the best start they kind of dampen it down, stop and start solving other things. But otherwise the magic effects are great. I highly recommend it, 20 parts was too little.