Park Shin Woo

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. (Source: AsianWiki) ~~ Adapted from the webtoon "Dr. Jekyll is Mr. Hyde" (지킬박사는 하이드씨!) by Lee Chung Ho (이충호).

Twin sisters Yoo Mi Ji and Yoo Mi Rae differ in everything except their faces. Yoo Mi Ji, the younger of the twins, has ended her short heyday as a promising track and field athlete and is currently living a free-spirited life. On the other hand, the older sister of the twins, Yoo Mi Rae, who has been walking the path of the elite since her school days, is a perfectionist working at a public corporation. The twins, physically identical but leading starkly different lives, embark on a bold charade, switching lives for some undisclosed reason. Lee Ho Su is a lawyer at a large law firm with a tall appearance and a seemingly carefree attitude. He may look like a noble swan with no external flaws, but he works harder than others to live an ordinary life, and this is because he has been living a different life than before after experiencing something in the past. As a result, he lives a calm life without showing his true feelings, but one day, an unexpected encounter occurs that sends waves through Ho Su's heart. (Source: Korean = Naver || Translation = MyDramaList)