Imouto Onaho no Tsukuri Kata

A young man discovers a mysterious method to transform his younger sister into a personal sex doll. Using a combination of hypnosis and conditioning, he begins to manipulate her mind and body, turning her into a willing and obedient toy for his own pleasure.

As he delves deeper into this dark practice, the line between reality and fantasy blurs. His sister, once a normal girl, becomes increasingly dependent on him, losing her own will and identity. The brother must confront the consequences of his actions as the transformation takes hold, threatening to consume them both.