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During summer vacation, I returned to my hometown with my mother to visit my aunt, Shiina-san. It had been a long time since we last met, but her defenseless chest, glistening with sweat, was so beautiful that I couldn't concentrate on my homework at all. Shiina-san, who always treated me like a child, suddenly pressed her body against mine when we were alone, approaching me with a mysterious smile... Without caring about getting drenched in sweat, Shiina-san writhed on top of me, grinding her hips with single-minded intensity. My summer vacation has only just begun...
