Calum Hood is an unclaimed, untrained submissive. He's been on his own for as long as he could remember, and from what he's heard, he's better off that way. He cherishes his life, dominant-free. He believes that he'll live the rest of his life as one of the world's only unclaimed submissive, but he's proven wrong. Ashton Irwin is in need of a submissive, and he wants a challenge. When an untrained, defiant submissive comes to him, he considers it the long-awaited test he's been looking for. Cashton/Muke/Ot4