Asa: The Girl Who Turned into a Pair of Chopsticks - Natsuko Imamura
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Asa tries to give her classmate a biscuit. Nami evades her classmates' playground game of acorn-throwing. Happy decides she's not interested in doing anything other than lying down on her sofa.
Each of these three stories begins in a reasonable place-but by the end you'll find yourself in another world altogether.