In a dimly lit dungeon, a seasoned dominatrix begins her slave's training with a chastity belt. She orders him onto a stool, his cock and balls exposed, as she meticulously measures and secures the cage. She attaches a small lock, the key dangling from her neck, and commands him to stand. He wobbles, unaccustomed to the weight and restriction. She watches, delighted, as he struggles to maintain his composure, ready to break him in further.