Youtarou Hanabusa's feelings are summarized in eight words: "I just want to live a normal life." Unfortunately for him, as a member of the Knights of the World, his training in this ancient and international order has left him with a condition he refers to as "White Knight Syndrome," which causes Youtarou to act heroically and chivalrously whenever he encounters someone in danger. He wears a mask at all times to conceal his identity in such uncomfortable situations. Then one day, he saves the life of Makio Kidouin, the young daughter of a wealthy family. Little does he realize that this solitary act of courage will permanently impact his life. Soon, he is bestowed with a life in the lap of luxury.