Want a full Guide? !Spoiler!
Collect the Poster for the Slimeform. Use the Slimeform on the Vent to travel into the left Room, then collect the Walkie for the Walkieform. Return to the right Room, call the Guard while staying UNDER the Table, (saves a few seconds). Once Guard turns the Light on, the other Girl will follow. As soon as she moves, Vent travel to the left Room, call the Guard again. Instandly travel back to the right Room UNDER the Table (they cant see you there even with Lights on.) Activate the Fox in a Box and rush over to the left Door either per Vent to the Middle or just by holding A. Close the Door. Now you are free to fuck both. I recommend the Bunny first s the Guardfuck ends the Level. Enjoy. Also make sure the Light in the Left room is off before you call the Guard. She takes time to turn it on.