Naughty Little Sister

Synopsis

For years, Seo-Hee had a crush on Ji-Ho, a childhood friend who is more like an older brother. One day, she tries to make Ji-Ho fall for her through a hypnotic spell, and he goes along with it to keep her from leaving. But how long will he be able to keep up the act?

Also known as Naughty Little Sister / She's Not My Siste / Ella no es mi hermana / 동생이 아니야