Ohashi, who is an university student, prides himself with his hot hunk body. One day, Ohashi is taped off by Dr Shibazaki, who is a professor of psychology at his university. But in fact, Shibazaki is also an expert of BDSM, and a skilled Master who trained many slaves in the past. Shibazaki finds that Ohashi has the potential to become a good slave. (Source: tagame.org) Included one-shots: Volume 1: Trap Volume 2: Trap 2 Volume 3: Yami no Naka no Shamo, Hikokumin