Saito was my classmate and sat at the table next to mine. She is very naughty and often teases me. Today I will decide to regain my dignity! I challenged her to guess what I had put in my box. I was confident that I had sealed it tightly and prepared a second box inside so she had no way of knowing what was inside. But without even opening the box, she knew I hid the eraser inside that box! The next day she brought a box that she was preparing to challenge me. Whoever loses must listen to the winner. And the result is still the same, I still haven't been able to win against her once. And when she said her request, I almost couldn't believe my ears. “Let's have sex.” Saito started kissing me, undressing and frantically sucking my cock! Then I inserted my cock into Saito's wet pussy, our moans mingling together echoed throughout the classroom!!! Library, gym, medical room, outdoor, etc. I can't resist her temptation!!! We gradually became closer, I proactively invited her to come home with me and we both gradually had feelings for each other...