水抜き穴
The frontal flap of a school swimsuit (intended as a water outlet while swimming), either being pulled open or otherwise displayed as a focus of the image.
These flaps only appear on old school swimsuits; if it doesn't have a flap, it's a new school swimsuit.
This tag does not apply if the swimsuit bottom is merely pulled to the side to reveal the genital area; use swimsuit aside for that instead.
The following tags are aliased to this tag: sukumizu_flap (learn more).
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