Nanami Hirose works as an aqua aerobics instructor at a fitness club. Today is a private lesson day, and one of her students, who lacks confidence in swimming, loses balance in the pool and clings tightly to Nanami. In the process, he accidentally touches her breasts and buttocks. Despite the physical contact and the buoyancy of the water, she continues guiding him professionally until the lesson ends. An unusual experience unfolds, woven from the tension of being in water and the sensation of physical touch.