Xiao Ai is a hero. He worked in a small company, and in order to pay off his debts, he had sex with his boss's granddaughter Emma.

Emma is the heroine. She is the boss's granddaughter. She has a beautiful appearance and independent personality. She started her own business and hired Xiao Ai.

Therefore, Xiao Ai and Emma are the relationship between the hero and heroine in My Beauty Boss, and the difference between them mainly lies in the role setting and the character relationship.