Beyond famous productions like Goblin and The King: Eternal Monarch, there are many hidden gems and bright series in the romantasy genre. Romantasy, which includes romances wrapped in magic, fate, and impossible worlds, is far more popular among K-drama viewers than ordinary hits. If you are a brave romantasy fan looking to discover new content, you’re in the right place.

The best romantasy series stand out with their fantastic supernatural elements and heartfelt stories featuring characters like gender-swapping princes, cursed immortals, mermaids, devilishly clever scholars, and dream-seeing prosecutors. Whether you are a lover of traditional sageuk or a fan of modern fantasy, these romantasy K-dramas will remind you why this genre is so addictive.

The King's Affection is a gender-swapping sageuk that, while not technically fantasy, gives a completely magical feeling with its "or..." concept. It showcases the destinies of twin siblings of different genders and a fantastical kingdom. Park Eun-bin delivers a defining performance by balancing royal authority with vulnerability. The romance with Rowoon's character is delicate and somewhat complicated due to the secret identity element. The King's Affection has won an International Emmy Award and has been widely praised for its emotional depth. It is adapted from the manhwa Yeonmo; this adaptation hypothesizes that a secret king could have existed between two famous kings in history.

The King's Affection begins with the tragic death of Joseon's Crown Prince Lee Hwi in an accident. His twin sister Dam-yi (Park), who was condemned to death in childhood and exiled, returns and is secretly convinced by her grandmother to take Lee Hwi's place. Dam-yi agrees, and for years, she lives as a couple, studies, governs the kingdom, and hides her true identity from everyone, including her father. While portraying the crown prince, she falls in love with the royal tutor Jung Ji-woon (Rowoon), who is a gentle-hearted person with a complex mood. However, he seems to notice something secret about this version of Lee Hwi. Their forbidden romance grows; Lee Hwi tries to keep his secret, navigate the deadly politics of the palace, and ultimately ascend to the throne. While not pure fantasy, it offers a romanticism worth imagining.

The Legend of the Blue Sea, although a romantic fantasy series, is also seen by many fans as a wonderful comedy. The series features a talented cast and serves as a successful example of why the romantasy genre is so popular among viewers.