Meet a woman cleaning toilets at a traditional inn where you're staying. Pretend to use the restroom and sneak into the toilet she's cleaning. Deliberately position yourself so she can easily see your cock, teasing the middle-aged woman with glimpses until you propose having sex. Pressure her into agreeing reluctantly, and she finally gives in. Attempt to record the act with a hidden camera set up beforehand, but she shows no sign of noticing the camera placed in the blind spot. A calculated and skillful operation.