there are 3 seasons and each season got a diffrant name.
there are of course treatments in them. i have not checked them all, but more like a fast check,
in sseason 2, ep 19(german says ep 19) 1 of the girls get bound and gagged(see poster for girl)
season 3 got the main girl bound and gagged in ep 4 and 5, in ep 4 she gets kidnapped with rope and tape, and in ep 5 she gets a close up during the transport and escape