Kaiden – a mysterious ability user who takes refuge in the body of a stray cat. After being injured in a battle with another ability user, he is found and taken in by Jiwoo. Stubborn and bossy, Kaiden clashes with his new caretaker. Jiwoo – an energetic and talkative high schooler with a love for cats. Kind-hearted and compassionate, he also seems to possess a unique ability of his own.