Oreane is back! This time, a girl with a perfect body appears, raising expectations even higher. The older sister, a member of a women's college tennis team, isn't particularly skilled with her racket. To help her improve, her younger brother's friend and older brother lie about giving her swing instruction. In reality, their true goal is sexual harassment under the guise of coaching. They give her erotic massages to relieve her tired body, spy on her while she showers, and gradually push the sister to the brink of climax. However, she turns out to be a wicked instructor hiding behind an innocent facade.