Sayuri, a beautiful mature mother whose son, who was so cheerful, suddenly withdrew and is at a loss. However, she does not realize that she is possessed by the delusion of jet-black armpit hair that her son has seen. And the delusion of armpit hair hits not only the son but also the homeroom teacher who came to consult his mother, and even witnessed the hairless lower body. While doing so, my son, who was growing more emotional, finally became unbearable ...!
