The exclusive 7th installment of Mio Ishikawa, a rough star in the rough! This time, an encounter with the unknown! First challenge to Bubble Princess! We invited an active soap lady from Yoshiwara as a special instructor to take lessons such as how to mix lotions and mat play. - First challenge to immediate SEX, crawling chair, periscope, etc.! - Even though she is on the side of serving, her sensitivity is too good, and she feels her whole body on the mat! It feels so good that it seems that an adult amusement park will become a habit! ?? - The first thrilling experience of a girl who grew up without soap! Serve Soap!