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Pettanko is not a trope. UsefulNotes.Pettanko is a fanspeak term definition only. The tropes are A-Cup Angst (girl is sensitive about her lack of size) or Petite Pride (girl is proud of her flat-chestedness). Anything else is not a trope. Please return this example to the page under the correct trope if (and only if) it fits one of those two tropes.
Someone also needs to read Zero Context Example.
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