Yaoi of course degozaru~ A friend of mine made a fanfiction of me before and read it to me degozaru~ It was terrificing degozaru~
*Cough* getting back on the original topic: Besides the ones mentioned above, the only other reverse-harem novel I can think of is: - Mei Gongqing (Chinese historical reincarnation romance. A concubine who has lost the love of her husband commits suicide and travels back in time to before she met him. Now she has a second chance to avoid fate, with knowledge of the future. But her "wisdom" attracts many other men to her. Including her former/future? husband.) Potential reverse-harem, but too early in translation to tell: - Like Hell I'm Gonna Get Captured! (Man gets reincarnated as a young girl in the world of a dating sim game. S/he tries to work hard at this new life, and ends up becoming somewhat like a school idol. But all s/he wants to do is hang around with cute girls, so why does s/he keep bumping into the same bunch of boys?) - Soshite Shoujo wa Akujo no karada o te ni ireru (Girl who was bedridden for 17 years with a weak body accidentally died and ended up getting transferred to a strong healthy female highschooler's body. Unfortunately, the life she took over was a man-chasing despicable girl who used manipulation and blackmail to steal other people's boyfriends and ruin relationships. She had manipulated herself into the student council full of ikemen, and earned the hatred of many schoolmates. But who cares about the past? She can run around in good health!)
I have no preference in the group dynamics, it could be 3 females and 5 males. The only thing is how well the story is put together. If i had to choose between the two choices i would go with the reverse harem, since I've been reading a story about a sex slave and her domineering male captures.