Akane and Kiki Seki, two stern Japanese nurses, take on a unique patient at their private clinic. Kyon, a horny young man, needs specialized 'rehab' to control his relentless erections. The nurses, under the guise of therapy, teach him to ride their strap-ons, starting with Akane's massive, realistic dildo. Kyon, now a 'ponyboy', learns to take commands, his nose hooked to the reins. Kiki joins in, and together, they train Kyon to ride their cocks simultaneously, his ass and mouth stretched to the limit. Subtitles add a layer of humiliation as he begs for more, his rehab session ending with a torrent of cum.