Nice one. Took me a good 20 - 30 minutes to complete. Really liked the dark cyberpunk-ish vibes. And I loved the ending message "typing up" the whole bondage theme, heheh.
Also, I know you designed the game with this switch-switch gameplay in mind, but I think the gameplay would feel much faster if one girl could be controlled with WASD and the other one with the Arrow keys or IJKL like those old Flash local coop browser games.