Here are the lyrics someone wrote on youtube, I'm not sure if they're right.
Nose, nose, nose, ... [12 times]
Flip the nose, "pu-n" ...
(interlude)
You said to me, "Your coif looks odd".
So I flip your nose, "pu-n".
You asked "Did you get fat of late?"
So I flip your nose, "pu-n".
Circle, triangle, rectangle
Nose is in the center of the face, so gracious!
Sine, cosine, tangent
You and I are "piroron-pi"!
(interlude)
Flip the nose, "pu-n" ...
Fan Made VideoAt first it was annoying But now It's sort of cute, and it's kind of weird how Mai's voice is better than Koharu's.