Soo Jin is an average girl. With a brother in the hospital and parents who couldn't care less, she does any job that she comes across, all for money to pay her brother's hospital bills. Soo Jin's only goal is to make money. As well, she volunteers at the hospital dutifully, caring for patients like her brother. She's never thought about love, her future, happiness, or anything else. 

Then there's a boy.

She keeps running into this quiet looking guy everywhere that she goes. Then, one day when she comes in to visit her brother and do her volunteer work, she discovers that this boy's name is Jisu. 

And he's her brother's roommate. 

What could this lead to?