yuri is a 19 years old girl. she has to take care of her sister after she lost her parents. in order to pay  a school fees for seohyun, she has to work. she work as a waitress at a cafe near her house.

donghae is a romantic and cheerful guy but everything has changed after his wife died in a car accident. he has one daughter, yoobin. after his wife dead, he never care about what happen around him including his own daughter.

what happen when donghae's mother ask yuri to become yoobin's babysitter?