Help find? Guy gets blackmailed (Or maybe forced via debt) to star in a femdom porn shoot

[Futafemdom]

The guy shows up, and the crew thinks he's a real Sub, so they treat him like one the entire time. Often he's left in bondage, (Possible chastity?). In one of the later chapters, another person gets sent by the blackmailer, this time its a girl. At the end, I think he becomes the female director's real sub, I'm not sure.