My best friends Shin-chan, Kyo-kun, and Gochin are in front of my mother. That's why I often come to play at home. One day, a shocking event hit me! How, Shin-chan and her mother were having sex in the bathroom! I got a high fever because of the shock, but I can't bring Shin-chan and my mother closer anymore. I have to protect my mother ... However, Kyo-kun is also having sex with his mother so as to outsmart me.