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.
Weirdest thing I ever read. It's about these two guys fucking each other and fucking other people. Idk I might not be the best to judge but to do a persons dad and then the son to get revenge and finding out the dad is sexually attracted to his son is really messed up. Like WTF. I still finished it but probably would want to remove this from my memories
Neji no Kaiten