Oh my danger territory there. But I'm interested to see more of Nikaidou, her life and character, stuffs like that. Then I'll be able to judge if this is good for my health.
This series has a cool name though =)) I think that between friendship and lust (according to the old greek definitions) there is romantic relationship, something that has both appreciation for the partner and intimacy without being selfish or possessive. The mordern day's idea of a stable romantic relationship, in fact.
Don't know where this is going, but I sure hope the girls get happy together in the end.