[Kumogakure. (Sukumo)] Prison Singularity (Fate/Grand Order)

Two powerful warriors find themselves subjected to a mechanical ordeal that tests their endurance. Bound by wires and machine-assisted stimulation, their composure breaks as they face a relentless routine of sensory overload. As the intensity builds, their bodies become canvases for strange markings, leaving them vulnerable to a systematic process of pleasure and public use. What begins as a controlled experiment evolves into an undeniable loss of control, where the line between command and climax blurs entirely.