One summer, amid the roar of cicadas, a man helps his childhood friends, the Kitano couple, move house. Mina used to tease him and always felt like one of the guys, but after years apart her new sensuality, fuller breasts, and huge ass leave him secretly aroused. Oblivious to his desire, she works in thin clothes that reveal her underwear and nipples. Overcome by the heat and her defenseless body when they are alone, he grabs and kneads her ass, leading to repeated rear-entry sex and creampies.