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Recently, a sound that activates the human body has been developed in top-secret. On a trial basis, the government decided to play this sound in an elementary school's public address system. Girls are growing taller and taller every day, in both height and ability! Boys who were strong are now too
Girls overtook boys after playing the sound of only girls grow up in fitness tests(pdf, jpg, mp4) - 女子成長クラブ(girl grow club) - BOOTH