U-Prince: Brian

Mantou, a Mafia boss's daughter, dreams of getting married after high school to the man she was betrothed to as a child. But that man has other dreams. So her parents try to arrange another marriage. This time the chosen groom is the son of another mafia boss.
At first, Mantou refuses since she feels nothing for Brian, not knowing that he has had a crush on her since they were children. However, Brian strives to win her love in the midst of jealousy, misunderstandings and a potentially devastating battle between Thailand's three major Mafia families.