Sarai Kannagi and her partner Flicker are two 'warrior maids'. They reside in a post apocalyptic world that's filled with monsters and anarchy. These 'warrior maids' are hired as protectors.

This set of images shows Sarai encountering other maids who are bound with fetish gear. They have leather gags.
Sarai and Flicker themselves also get bound with rope by the same people.

The scene is very overtly fetish themed.