At the Tomoda household, which runs a private lodging business, visits from a swim team have become an annual tradition, and wife Maki happily attends to them each time. One day, the team's rising ace, Tsukasa, confides his troubles to her. Maki empathizes deeply with his feelings and decides to reveal her own hidden desires. In response to her words, she takes his powerfully erect cock into her mouth. As she gives him a blowjob, her body gradually grows hotter, fulfilling the long-suppressed cravings of her sexually frustrated heart. Soon, Tsukasa's throbbing shaft loses control, entwining tightly with Maki's lips, and their relationship evolves into something entirely new.