These two episodes exist purely to let the main cast be stupid together without the plot getting in the way. The first one is basically a FAQ about mermaids answered by people who have no business answering FAQs. The second is Maia's turn to be the center of chaos, and it lands because the show knows exactly how much absurdity its characters can survive before the joke collapses.
In a future where oceans have risen and humanity lives beneath the waves, the crew of the submarine Daphne continues their search for treasure and adventure. These two standalone episodes break from the main narrative to offer a different kind of fun, diving into the absurd corners of their underwater world. The first chapter answers questions nobody asked about the Nereids, the mysterious race that inhabits these depths, through a comedy of errors and ridiculous explanations. The second follows Maia Mizuki as she stumbles through a situation that forces her to confront what matters most, all while the chaos around her refuses to take anything seriously. Expect less dramatic tension and more laugh-out-loud moments as the crew embraces silliness over survival. The tone shifts toward pure entertainment, letting characters bounce off each other in unexpected ways. These episodes work best if you've already met the cast and care about their dynamic, since the humor lands harder when you know who these people are. It's the kind of bonus content that rewards fans who want more time in this world without needing a grand narrative excuse.