Slave-colored stage: days of training

Yuri, the only daughter of Tanabe Real Estate President, learns about her father's second wife, Ryoko, who was a sex worker, and tells her to quietly break up with her father. Kaoru, the lawyer in the Yabuta Group, who is in a panic and has been taking Ryoko's hands behind the scenes in an attempt to take over Tanabe Real Estate, kidnaps Yuri to keep her mouth shut...