Krystal is a perfect girl. Everyone adores her especially her parents. Because of that Krystal grows up as a spoiled girl and has princess syndrome. On the other hand Kai has the same problem as Krystal, he is a perfect guy. That's why he grows up as a spoiled boy and has prince syndrome. Krystal and Kai have known each other since childhood and never get along well. What happen when their parents make these two who have syndrome of prince and princess into an arranged marriage ??