The Turn of the Screw

Ryu is sleeping with his college professor, but doesn't feel loved, so he decides to kidnap his professor's son, Hayato, out of revenge. As it turns out, Hayato's relationship with his father is not very good, so he winds up living with Ryu.

Note: The doujinshi called "Neji no Kaiten EX", begins when they start living together. It was released inside the volume of -6mm no Taboo.