As an office worker, Sho Itoguchi's professional life is supplemented with the hobby of selling urethra bougies via his website. One day, when he sees his boss Noriyuki Kiyama's name on the potential buyer list, he visits his house with a few urethra bougies to present to him. During the explanation of their usage, Noriyuki experiences an intense pleasure, despite being a first timer, causing Sho to be unable to contain his excitement.