Ever wondered what the lyrics meant?

Pettan, pettan, tsurupettan
Pettan, pettan, tsurupettan
Pettan, pettan, mochipettan
Pettan, pettan, mune pettan

becomes:

Flat, flat, smooth and flat
Flat, flat, smooth and flat
Flat, flat, flat as a pancake
Flat, flat, flat-chested

Today I'll sneakily hide in the trees again and keep stalking Reimu!! (Stalking!!)
I'll wait and steal some of the bean buns...