My nieces, my sister's daughters, are finally reunited after years apart. They couldn't be more different; one is responsible like their mother while the other is carefree like myself. Their youthful bodies glisten with sweat underneath their clothes, revealing hints of their developing curves and accidental panty shots. These young ladies can't help but reminisce about old secret games they used to play together—games that involved showing off their tanned bodies and seeking out their favorite uncle for some much-desired pleasure...

数年ぶりに叔父と再会する、しっかり者の姉「みこ」とお調子者の妹「なな」の姪っ子姉妹。洋服の隙間から見える汗ばむ素肌、成長途中の膨らんだ胸、無防備に見え隠れするパンチラ。姪っ子姉妹は昔、味わった秘密の遊びをしたくて、日焼けしたカラダを露わに見せつけ、大好きな叔父さんを求めてイク…。