Noticing that Shinoda's wife has recently had many strange expressions, often going early and staying late, the husband decided to buy an invisible potion so that he could easily track her shady deeds. His hunch was not wrong, after pretending to go out for work, she immediately called her mistress to come, now that he knew that she had ruthlessly cuckolded him, he was even more surprised that her mistress was the director of the place where he was working. Until the two of them axeted each other into the room and started the affair, the anger had reached its peak, but partly because he was shy, and partly because he was afraid of losing the stable job he was doing, so he could only stand and watch and try to endure it by masturbating to calm his anger.