My homeroom teacher went on maternity leave, and my assistant teacher , Sasahara Yuri, who I had been interested in for a while, became my homeroom teacher. I was so preoccupied with my teacher that I couldn't concentrate on my studies and my grades dropped. Worried about this, Yuri decided to give me special extra lessons in her room, but when we were alone, I couldn't help but get aroused, and Yuri...