Karasu is a prince of the royal family who inherited the power of dragons and a cruel personality. Everyone fears him except for Able, who approaches Karasu, protects him, and teaches him about the world. Able is the only one who can control the prince's power and cruelty, and show him warmth. Karasu, in turn, finds solace and sweetness in Able's presence, opening his heart to him as they spend happy times together.
