["bondage" "rape"] might be pretty much the same. Though the confinement detail would still be missing. I think that confinement is just a type of "torture", but it would basically be impossible to find it among all other types of torture overall I think it would be redudant. I have a better idea. Someone proposed create tag transforming heroine +5. That and other tags like "magical girl" I think would make it easier to find this trope without needing a "captured" tag