連鎖 ～裏切りの鎖～

Chairman of high school established a prostitution organization based on his high school. Both students and teachers that enter the school get in its net. One day chairman orders his son to train three new slaves to eliminate the lack of prostitutes. The son needs to train one and order her to train the next one forming a chain of training. Thus there twelve combinations of training patterns.

[From vndbreview]