On a midsummer afternoon, the heatwave was record-breaking and I couldn't stop sweating, so my mother left me, a student preparing for college entrance exams, on a trip, and my aunt Yuka came to take care of me. The two of us were alone under the same roof, and my heart was pounding when I saw Yuka covered in sweat. One day, when I came home from cram school, Yuka asked me a question. "Are you interested in girls, Takashi?" I couldn't answer, but Yuka, with a seductive smile on her face, pounced on me...