I called for a "promotional girl," but it turned out to be a colleague from work... From today onwards, this woman is my unprotected, big-breasted toy. (Asuka Riina JUFE-248)

Exploiting my tacky colleague's weakness, I'm going to use her M-cup body for some serious training! I called a "promotion girl" over from my place, but instead, it was my usually tacky and mature colleague, Asuka Riina. She begged me to switch her out, but since she's already here, I might as well have some fun with her...