MC Corporation was driven to the brink of collapse by sabotage from a rival company, leaving only one employee behind—Hanamiya Rei. She was a trusted figure within the company, the last remaining hope for its survival. Then, in a sudden and shocking turn of events, she attacked Yoshimura. As Hanamiya's mind-control finger targeted Yoshimura, her face revealed intense hatred and a burning desire for revenge. "Sister's vengeance..." she whispered, delivering both humiliation and pleasure to Yoshimura, transforming him into a being completely dominated in body and mind. Through this process, deep emotions and primal impulses intertwine, giving birth to an entirely new relationship.