Face (2001)

He Fei's wife, Li Mu Zi, disappeared mysteriously during their wedding anniversary trip. While he was searching for Mu Zi, she appeared again out of nowhere, but he insists that the strange woman in front of him is not his wife. Lawyer Chen Mai gets involved in this bizarre case, and more mysteries slowly emerge.

Urashima Eiji is a university student and his father is a serial murderer. One day, he realises that he is suffering from a dual personality disorder and worries that his other personality may have committed murder. This leads him to begin investigations to find out the truth.

~ Adapted from the manga series "Shinai naru Boku e Satsui wo Komete "by Inoryu Hajime (Story) and Ito Shota (Art)

Gu Seo Jin is a third-generation chaebol who runs the theme park Wonder Land. He seemingly has everything — looks, brains, and fortune. But a traumatic incident in his childhood resulted in Seo Jin having a split personality — one is a cold, ruthless man, while the other is the polar opposite, someone kind and gentle. Because of this, he vows never to date or marry. Seo Jin wants to get rid of the circus show at Wonder Land due to low ticket sales and high overhead costs, but he butts heads with circus master Jang Ha Na. Ha Na insists on saving the failing circus and dreams of revamping it back to its former glory. She soon finds herself falling for both of Seo Jin's personalities.

~~ Adapted from the webtoon "Dr. Jekyll is Mr. Hyde" by Lee Chung Ho.

A traumatic childhood experience leaves Cha Do Hyeon, suffering from memory loss and dissociation. The latter has resulted in the creation of seven distinct personalities. Wanting to regain control over his life, he asks Oh Ri Jin, a first-year psychiatric resident, to help him, but she eventually falls in love with one of his personalities. Ri Jin’s twin brother, Oh Ri On, a famous mystery novelist, investigates Do Hyeon and his family.