The annual summer training camp for the table tennis club has begun, and manager Mitsuki is doing her best to support the team. Perhaps because of her unusually proactive attitude, a younger male teammate falls ill on the first day. Sharing a room with him, Mitsuki gently tends to him while keeping watch. But as she sleeps, the boy, unable to control his urges upon seeing her, starts masturbating. Realizing what's happening, the younger boy panics, not wanting to hurt Mitsuki, and gently guides him with a handjob. Touched by her warmth, the distance between them quickly closes. Throughout the camp, while maintaining discipline in front of their teammates, they secretly share moments together like lovers, drawing closer and creating unforgettable memories of this summer.