Professional Boxer's Sister Starry Sky Kirari - Starry Sky Glitter

Nakamoto, the older sister of a professional boxer, finds herself in a compromising situation with Mr. Tajima, a man who offers to help her brother's career in exchange for sexual favors. As the story progresses, Nakamoto is coerced into a non-consensual relationship with Mr. Tajima, involving acts such as titjobs and creampie. The central kink revolves around the power dynamic and blackmail, where Mr. Tajima exploits Nakamoto's vulnerability to satisfy his desires.