[H2O Aquarium] Seisokei Bitch na Suieibu no Senpai to Chissoku Suichuu Ecchi suru Ohanashi [Full Color]

Dive into a humid, underwater world where the club members' secrets are more intense than they appear. A new member enters a setting where the rules of the pool are far from ordinary, facing a senior who seems more interested in sensory pleasure than actual swimming. As the tension rises beneath the surface, the boundaries between training and pure physical indulgence begin to blur amidst the bubbles and shifting light.