A Girl by Nature) is a 2014 South Korean daily drama starring Yoon So-yi, Park Jung-chul, Moon Bo-ryung and Kwon Yul.

Tae-jung, a smart, good-looking man from a humble background, had committed himself to luring and marrying a tycoon's daughter "against all odds," as part of an effort to get him into the upper class of society.

[1] Seon-yoo then meets Seo Ji-seok, an immature man from a rich family whose sister Ji-hee is married to Tae-jung.

To take revenge on the man responsible for her sister's death, Seon-yoo gives up her dream of becoming a nun.

Thus, Seon-yoo begins leading a double life: she pretends to be the ideal wife and daughter-in-law in front of the Seo family, and only takes off her mask in front of Tae-jung, proving she can be just as ruthless and vicious as Tae-jung.