Due to an administrative error, Misono, a city hall clerk, has to be the stand-in lifeguard for the local swimming pool over the summer. While the job is extremely boring, she got to meet Atsushi, who couldn’t contain his excitement when he saw her in her competitive swimwear. Since then, Misono and Atsushi spend their days sneaking around the pool and fucking. If you love competitive swimwear, you're going to love this work and its prequel.