Well first of the orgy and the lies is kind off unnecessary. It kind off mirrors the modern age and polygamy. But truly not a fan of the orgy and screwing people you have no feelings for, it proofs unethical for me. Anyways if your a fan of the sex friends type of relationship, where you can't justify your feelings and the feeling of betrayal (since the uke or seme can just fuck any other guys w/o the other party's knowledge). If your a new yaoi manga reader wouldn't suggest to read this first.
Sex Friends