Reika's Bitch Training ~Violated by ××…~

An old Western-style mansion stands quietly in the mountains of a certain summer resort... Inside, beautiful young ladies are being trained to become playthings. To be transformed into beautiful and pure, yet unable to resist pleasure... plaything dolls (DOLLs).
The young ladies who once wandered into the mansion and were trained by Koichi were each sold at auction, then taken to the mansions of wealthy masters, spending their days as toys.
Koichi, who trained them, disappeared from the mansion at the same time his beloved creations were bought away, and his whereabouts became unknown.
One day, a year later... Yamada, the mansion's butler, received a phone call. It was said that a young lady trained in this mansion had escaped from her master's residence... And the wealthy man who purchased this DOLL was furious, ordering the mansion to retrain her. Yamada frowned and asked for the name of that DOLL.
The escaped young lady was 'Nikaido Reika'...
To wash away the shame of 'retraining,' Yamada began searching for a trainer to train Reika.
Then he designated a man. 'Hanyama Taku (pseudonym)'.
He was a trainer famous for completely enslaving his training subjects. From Yamada's perspective, he couldn't fully agree with Hanyama's sadistic methods, but in the situation where failure was absolutely not permitted, he chose Hanyama.
Reika, believing Koichi was at the mansion, happily arrived, but there she found not Koichi, but Hanyama.
With only the hope of seeing Koichi again as her sole emotional support, Reika was devastated by the fact of Koichi's disappearance.
Of course, Reika detested and resisted Hanyama, but that only enraged him further, and he trained Reika with methods bordering on abuse.
Although Yamada warned him not to go too far, Hanyama ignored him and mercilessly tormented Reika.
What will become of Reika...