Cinderella and the Four Knights. I just finished re-watching this drama and am just as delighted with it as I was the first time. It's a typical poor girl ends up sharing a home with rich guy storyline (in this case, with three rich guys). High jinks ensue. It stars Park So Dam as Eun Ha Won, a plucky, hard working, no-nonsense, poor young woman about to graduate high school. She ends up taking a job pretending to be the fiance of Ahn Jae Hyun's character, Kang Hyun Min, a third generation chaebol heir. Hyun Min shares an amazing home with his two cousins, Kang Ji Woon (Played by Jung Il Woo), the recently reclaimed illegitimate grandson, and Kang Seo Woo (played by CN Blue's Lee Jung Shin who does a great job making your heart break for him), the chaebol idol. This is a romance, there are birth secrets, there's some serious second (well, third) lead syndrome. Everyone ends up (mostly) where they should be. It's not the strongest story line ever, but it's a lighthearted series good for when you want something bright.