Thicker Than Water (2015)

Sungyong's mom has a vampire son and she tries her best to get him fresh blood everyday. She gets the blood freshly delivered or sometimes goes to a blood auction. She and her husband do not have the same idea about raising their vampire son, Sungyong, so they have an argument. One day, Sungyong's mom comes back from the auction and realized that there's no blood left for Sungyong at home...