The manga itself was a pretty good idea - and I would actually have loved to see more on Murai, Amamiya, and Akane --> but that other model Amamiya getting thrown in the mix was stupid. What a bad way to end the manga :(
I have to agree, this one had potential. and not cause of the ecchi, but cause the story itself was interesting. if anything, the ecchi lowered the score by 1 for me.