At an onsen ryokan's mixed bath, a man accidentally ends up alone with his wife's mom friend. Though he thinks it's wrong, he gets an erection. Trying not to be noticed, he starts masturbating but gets caught. However, instead of being scorned, the mom friend seems to see him as a sexual object and even wants to watch him masturbate. Seeing the man excitedly gripping his own penis, she breathes heavily and can't help but reach out her hand…
