I finally started dating the swim club girl who looks great in a swimsuit and cutoffs, but when we're alone, she's harsh and always talks down to me, treating me like a toy. Before I knew it, I was trained into an M male. Although she appears slender, Yuko Mukai is actually a hidden muscle beauty from the athletics club. Her first display of S girl behavior is sure to send shivers down the spine of any M male.
