During this summer vacation, which is hotter than usual, I came to visit my aunt's house with my mother. Of course, the wooden house surrounded by fields was not equipped with an air conditioner, and I couldn't stop sweating from my whole body. One afternoon ... While my mother was out to visit her grave, she was asked to teach her study by Ryo Aunt. I'm alone under one roof, and I can't stop pounding. Whether or not I knew my motives, Ryo's aunt approached me with a bewitching smile ...