Lee Hyun is the perfect model student, but it's all an act. Beneath his polite smile is a desperate will to survive high school's brutal hierarchy. His quiet life is shattered when the school’s ruthless king, Choi Si-woo, singles him out. Si-woo’s obsessive attention is a dangerous gift, offering protection at a terrifying price. To avoid becoming another victim, Lee Hyun must play the part of a perfect pet. But in this twisted game of devotion and control, becoming the king’s favorite may be a fate worse than becoming his prey.