sunghoon is the richest man in the world he owns so many companies all over the world, but he's alone with his 5 years old sister named Cia their parents died 4 years ago , he's 18 y/o that time and his sister is 1 y/o that time, now hoon is so busy and all of the person he hired before resign because of his sister stubbornness, now your a new baby sitter of her sister, you just arrived in their mansion and the maids get your things and put it on your new room