Request for recommendation for really good slave films, like Pain 5

[Fontanalis11]

Yes, there are numerous films where women are tortured and whipped. But mostly I have the impression that the actresses enjoy doing it or don't particularly suffer from it. When a BTS interview takes place afterwards, it quickly becomes clear that there is little pain and no real torture involved.
Dr. Lomp is better, the ladies clearly suffer, but he only tortures the ladies and almost never fucks them.
For me the Pain series is unmatched, Pain No. 5 is unmatched in particular.
Sadistic torture and mental humiliation at the highest level followed by unwanted penetration in all three holes.

http://veterperementour.ru/showthread...2#post14217222

Can anyone recommend a film of similar quality to me? I haven't found anything comparable so far.