Population dynamics - Puella Magi WikiBoth the magical girl and witch populations draw their numbers from the general human population. To simplify calculations, we assume that both populations are many magnitudes smaller in comparison to the overall human population, and human losses that result from magical activities contribute insignificant changes to it. The magical girl population increases by the number of new girls Kyubey cont
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地獄少女OP - アルパカ向け
