The soft whir of hidden servos echoed through the dimly lit preparation chamber as Darren settled onto the padded bench, the cool air brushing his bare skin and raising goosebumps along his arms and chest. Dr. Voss stood nearby in her crisp white coat, her calm eyes meeting his with professional focus while the robotic arms above them flexed in silent test sequences, their feather-tipped appendages glinting under the overhead lights. "It's the light, unpredictable strokes that break me fastest," he admitted, voice low and introspective, heat rising in his cheeks as he described the way even a single brush over the head of his cock could make his shaft twitch and leak uncontrollably, his balls drawing tight with overwhelming sensitivity that left him gasping and spent within moments. She listened without judgment, nodding as she adjusted the monitoring leads on his thighs.

He reached for the consent forms she slid forward, the paper crisp under his fingers as he scanned the bolded safety clauses—emergency stops, real-time biometric overrides, and strict limits on intensity escalation—before signing with a firm stroke of the pen. Preparation unfolded seamlessly around him: soft restraints tightened over his wrists and ankles, spreading his legs apart on the bench so that his cock lay exposed and already half-hard from anticipation, the cool gel applied to his sensitive skin sending a shiver through his core. Dr. Voss's gloved hand lingered briefly near his inner thigh, her clinical touch reassuring yet charged, as the first feather-tipped arm descended into position above his groin, its delicate edge hovering just out of reach.

Darren's breath hitched at the sight, a mix of resolve and nervous arousal tightening in his gut, his exposed balls heavy and his shaft pulsing faintly against the open air. The facility's low hum deepened, promising the controlled torment he had sought for so long, and Dr. Voss's steady voice cut through the tension. "We'll begin at the lowest setting. Remember, you control the pace."

Darren settled deeper into the padded bench, the restraints securing his spread thighs as the servos hummed to life with a subtle vibration that traveled through the frame and into his bones. He hadn't noticed the full array of arms poised above and around him, their varied extensions—feathers, soft brushes, and sleek vibrators—angling silently into place from hidden recesses. Dr. Voss's voice faded into the background hum as the first feather-tipped arm descended, its downy edge brushing with exquisite lightness against his balls, tracing teasing circles that sent immediate sparks of sensation racing up his spine. The touch was feather-light yet insistent, the fine filaments dancing over the sensitive skin there, making his heavy sac tighten involuntarily while his cock gave a sharp twitch, a bead of precum welling at the tip and sliding down the veined shaft.

He inhaled sharply through his nose, focusing on the measured rhythm of his breathing as instructed—long, deliberate draws that filled his lungs and steadied the flutter in his chest. The tickling persisted in unpredictable patterns, the soft plume stroking along the underside of his balls, dipping into the crease where thigh met groin, then lifting away only to return with maddening gentleness. Heat flooded his face and spread down his torso, his nipples hardening against the cool air as arousal built despite his efforts, his half-hard length now fully erect and pulsing with each teasing contact. The full scope of the setup remained hidden from his angled view, but the initial low-intensity assault already tested the edges of his control, every nerve ending alight with that overwhelming sensitivity he'd come here to conquer.

Dr. Voss watched the monitors with quiet

The Endurance Protocol