Yoo Youngjae is the heir of the Yoo Holdings. He comes from a noble family and lives with his grandfather because his parents are no longer alive. He's shy but very kind with people.

The Jung's family has served the Yoo's family for ages. And Jung Daehyun will only serve his master, Yoo Youngjae. He is the highest ranking butler. Jung Daehyun is talented. He can cook. He can do martial arts. And has unquestionably perfect knowledge. He is a charming, protective and obedient butler.

To become the heir of the Yoo Holdings, Youngjae has to go to Hyeondae Academy, the prestigious school where all the students have their own butlers who will serve them even in school.