Go to the Beach with Me? X It's Not a Matter of Knowing or Not

Summer vacation! Seiji, Guri, Akane, and Yuzu invite Akua to head to the sea. Akane, who wants to get along well, invites her to swim with her, but her attitude is still cold. And try your luck at night! However, there is no reason why the liver test sponsored by Guri is just a liver test.