Cinderella's Man [Mature Version]

Years after losing his first love, Sina, to another man, Geonwoo is out for revenge. He's gone from rags to riches, but finds out that she's drowning in debt; it's the perfect chance to get her back with his wealth and power. After tricking Sina into signing a binding contract, Geonwoo hires her as his housekeeper. What exactly do his secret plans entail, and will the two be able to rekindle their once dream-like romance?