The Grave Sin Of A Fine Ass Rio Niyama's Suffer Yuki Jin. The rumor that the chiropractor at the Kado clinic is a gorgeous babe spread on the internet and appointments have boomed. That lovely doctor Rio (Jin) has a certain patient, Tasaka, with his sights set on her and this time he pressures her into going on a date. At a loss for what to do, she goes to the clinic director for help, but....