Dad's Elf, Son's Elf(2021)

Original title: 아빠의 엘프 아들의 엘프

One family hires a housekeeper because of their mother, the owner of a company who often goes on business trips. The former maid quit her job due to some circumstances, and a new maid came, and a foreign lady came. A foreign lady with a great figure! One day when he came home early during classroom break, he heard a strange sound his dad's study.