The game takes place in the near future where so-called "Mimic" robots work in place of humans. Playing as Reichi Kuroha, a member of a government investigation team, your job is to investigate the mysterious suicide of a Mimic -- a strange occurrence, since Mimics are not supposed to kill themselves. The game includes a number of heroines, both Mimic and human, with whom you'll get involved as the story progresses.

[from IGN.com]