Having to pay for his mother's hospital bills, lecturer Kang Seok can't seem to get ahead. He lives in room 303 of a hostel, while Ha Jin lives in room 203. She works for a struggling toy company but hasn't been paid for months. They meet on a blind date and find that they are 98% compatible. Ashamed, they hide the fact that they are poor from each other. They fall in love as they try to navigate their difficult lives.