So the guards don't seem capturable, and the capture info is wrong for Constance. It's not 9 frames, it's 7, and the seconds are completely off, the whole thing lasts like, five seconds, once you've gotten up close to her.
With that being said, stealth gameplay is pretty barebones, but I actually like the idea of the capture mechanic, and the mention of the bondage chair gives me a though of a Hitman style bondage game, where you have different ways of binding your target in the environment.
Regardless, I'd focus on that capture minigame going forward, make that the main centerpoint, after polishing it up and adding in some variety to it.