During this record-breaking heatwave, I, a college student, was back home for summer vacation. One day, my mother told me to deliver some vegetables to Nami-san, an old friend from the neighborhood, and I reluctantly went. When I saw Nami-san again after a long time, she had become a mature woman... Her beautiful body glistening with sweat and her cleavage made my heart race. The next day, when I went to Nami-san's house again, she seemed to be teasing my feelings, leaning her sweaty body against me with a seductive smile and attacking me...