A girl named KIM MI-SOO, joins the famous high school SHIN HWA HIGH, with the intention of staying within herself and not taking parts in any activities. There she gets along with some people and makes some friends, 1. GO AH-RA (A girl with boyish style and attitude). 2. JUNG LIA (A sweet and cute girl who has a habit of gossiping) 3. KANG TAE-YEONG (A guys with a gentleman personality and is good at mostly everything) and at last 4. LEE TAE-AH (He is JUNG LIA'S boyfriend and KANG TAE-YEONG'S BESTFRIEND).Unexpectedly she take part in PROM due to certain circumstances, and ends up searching for a guy who could be her PROMPARTNER. COME ALONG IN THIS JOURNEY OF LOVE AND FIND WHO WILL BE THE "ONE" FOR KIM MI-SOO IN THIS STORY CALLED "PROMPOSAL".