The key to friendship is stuck in a robot. 8.50/10 2011-09-25 25 minute.HDEverybody's out to prove that Nano's really a robot — especially the science teacher. The Professor gives Nano a machine gun arm and a new "Reaction function." Meanwhile, Mr. Takasaki sets his sights on the student advisor, Ms. Sakurai.An: 2011Studio: TV AichiȚară: Japan