Saito is my classmate and sits at the desk next to mine. She is very mischievous and likes to tease me. Today I am determined to regain my pride! I challenge her to guess what I have put inside my box. I am confident that I have sealed it tightly and even prepared a second box inside so she cannot possibly know what's inside. But without even opening the box, she already knows that I hid the eraser in it! The next day, she brings a box prepared to challenge me. The loser must obey the winner. And the result is the same, I still haven't been able to beat her once. And when she said her request, I could hardly believe my ears anymore. 'Let's have sex.' Saito starts kissing me, undresses, and eagerly sucks my cock! Then I thrust my cock into Saito's soaking wet pussy, our moans intertwining echoing throughout the classroom!!! The library, the gym, the medical room, outdoors, etc. I couldn't resist her temptation!!! We grow closer, I take the initiative to invite her home, and we gradually develop feelings for each other...