BIBI undergoes ultimate training at the hands of a master whose dominance has reached its peak. Decorated in an enameled dress and rubber socks, she wears a rubber hood tightly sealed over her head, with only a tiny air hole providing minimal breath. Her wrists and neck are bound by chains, rendering her completely immobilized as the master relentlessly strikes her with a riding crop. At precisely timed moments, the master cruelly blocks the air hole with his finger—an act of pure sadistic mastery. Through the narrow gap in the hood, BIBI's expression reveals intense agony and humiliation. The detailed portrayal of her suffering face is one of the key highlights of this scene.