I've never write a review before, but there isn't any review here, so i'll write something. This series is definitely not childish like most people think so. If you like magical-girl theme or innocent anime, please give it a try! I really recommend it. I like this series because of the characters (different characters from season 1), they are created by the designer of Nanatsuiro Drop. I really enjoy this series. Some day i will rewatch it.