Park Lee Young ay siyang tumatayong ama sa tatlong magkakapatid. He is a doctor. His parents died due to vehicular accident last two years ago. Living with his three younger siblings is really difficult. While Erin lived in the rooftop the same building with Lee Young's apartment. She is Tae Young's teacher. She helps him taking care of his siblings. Will there be a good reason for them to take care of each other? Please read their entire story. #unedited