Nichijou - Episode 15

Now that Nano is regularly attending school, they key in her back inevitably continues to attract attention, particular from Yuuko - cue a decidedly amusing opening sketch to this fifteenth episode of Nichijou that sees her try (and fail) to get her to out her robotic ways before missing a dead give-away as her attention wanders elsewhere.

It seems that Yuuko isn't the only one with an interest