As usual family and job related problem

Drama start with lead actress who leave her house to Seoul to complete the promise made by between her and cha dol bong at their child age but he forgot his promise because of the problem he dealing with life for not getting job and this promise made 12 years ago and it is childish act so. It is normal to forget .Cha dol bong had one sister and one brother who were also busy in their job that they forgot their father bday who spend his whole life for them without thinking? about himself but it is not that his children are bad because of the situation had come that they unable to take out time for him.