Twins/Duality/Split personalities/Possession

"Good" and "evil" twins in power struggle. Fantasy.

Gentle, insecure crown prince who shares body with the evil spirit Akhee.

Funny and adorable boy who has a monster personality that he doesnt want to set loose.

The tyrant king who's spiraling out of control has a look-a-like in the form of a sweet and gentle jester who's performances mock the royals. Switch time?

A gender bend treasure where a male macho chef ends up in the body of a queen in joseon times. 

Split personality due to amnesia.

Dual identity with political intruiges.

Dual identity of a woman who is a noble woman in the day, and disguised as a man at night.

Dual identity.

Hidden identity, time travel

When the crown prince dies, his female twin takes his spot as a royal. Gender bend goodness.

A woman disguised as the kings euneuch.

To clear her name a woman hides in the palace as a eunuch.

During the Joseon Dynasty, a young woman named Hong Chun Ki was a painter – a true rarity in Joseon Korea, where Confucian values dictate that such pursuits are unsuitable for a woman. She was born blind but somehow managed to acquire a sense of vision. Now, she has been accepted to the most prestigious art college in the land. One day, she meets Ha Ram, an astrologer whose fate is the polar opposite of her own: Although he was born sighted, he lost his vision in a childhood accident. Regardless, he is also in possession of an astounding talent that allows him to read the future by tracing the movement of the sky at night, despite the fact that he is blind.

In 18th-century Korea, Prince Yi San is a perfectionist haunted by his father's murder. He's set to inherit the throne once his cruel grandfather, the current king, passes away. Despite the emotional scars left by his father's death, Yi San aspires to be a benevolent ruler who reforms the kingdom's laws. At court, he encounters Sung Deok Im, a spirited and intelligent young woman. While Yi San falls in love and proposes she become his concubine, Sung Deok Im grapples with the restrictions and responsibilities that come with royal life. However, as their love deepens, she begins to see the potential to bring positive change to the troubled realm through their union.

A spirit of a general, who has followed the incarnation of his wife for 1,500 years, finally aquires a body to end the circle of reincarnation and suffering.

supernatural, FL has multiple identities, "she is faced with a strange occurrence where she must change into a different body and new identity for one week a month."

A vampire in the Joseon era. Lee JoonGi!!!

Due to an ancestor's fault, Han Hae Na's family has been cursed for generations. When someone in her family kisses anyone, they turn into a dog at midnight for six hours

Min Jae Hee is a middle-aged housewife, who has devoted her life to her family only to see it fall apart before her eyes. She discovers a miracle perfume that makes her look young again.