After club activities, in the empty clubroom, I get incredibly lucky and witness Mai-chan shoving her hand into her panties, stifling her moans as she masturbates. This sense of forbidden thrill is the ultimate male fantasy. "You were watching, weren't you...?" With her face flushed red, Mai-chan casts aside her shame and bares her raw instincts—it's utterly irresistible. The texture of her sweaty skin after practice, the musty smell under her uniform. The vividness that seems to drift right up to your nose shatters your self-control. Once the fire ignites, there's no stopping—sweaty pistoning and intense entanglement. This secret between just the two of us begins a clandestine affair with a youthful athlete. What would you do if your favorite girl was masturbating alone in the clubroom after school? If you miss this, you'll regret it for life!