Dai-kun came to his mother's hometown in the countryside to concentrate on studying for his exams during summer vacation. There, he meets his two aunts, Reo-chan and Asuna-chan, who have been taking care of him since he was little! The two get excited when their cute nephew comes to visit after a long time, and decide to play around with him to see how he has grown... A summer filled with studying for exams and carnal sex with his two aunts. A yukata and sparklers, a great summer memory...