Strange & beautiful

Here's the English version: A TAL (mask), passed down since ancient times, transforms its wearer into a mystical Dokkaebi. A mischievous Dokkaebi who loves playing tricks while helping people. A sacred Dokkaebi who vanquishes demons spreading darkness across the world, starting from Korea. When a child sponsored by the female lead — an idol — is kidnapped after becoming entangled in the theft of the Royal Seal from the National Museum of Korea, the hero appears to help her... "I'll grant your wish. But nothing comes free. Want to make a bet with me?" Betrayal by a trusted friend, a hidden boss, and even a Gumiho who comes to the hero's aid — can the hero truly save the world?