Saving the world... by fishing? Yuki Sanada has always felt like a fish out of water. Socially awkward and anxious, he struggles to fit in with his surroundings and moves from town to town with his grandma. As he and his grandma settle into the charming seaside town of Enoshima, Yuki hopes for a fresh start. However, his reputation at school is jeopardized by the arrival of fellow transfer student Haru. The eccentric Haru immediately makes a splash, wildly claiming to be an alien and declaring that Yuki is his friend. Pairing the reluctant Yuki with their classmate and fishing talent, Natsuki Usami, he tasks both of them with the absurd mission of saving the world from a mysterious threat in the ocean. Mischief and hijinks ensue, as these three embark on a whimsical adventure filled with laughs, heart, and self-discovery!

As the story of Rozen Maiden closes, a new chapter begins in Rozen Maiden: Träumend. Shinku and the other sentient dolls of the Rozen Maiden collection are living life as usual at Jun Sakurada's house. Having settled into his role as Shinku's partner in the deadly Alice Game, Jun overcomes his former fears and prepares to return to school. And although Shinku and the other dolls idly pass the days by in the comfort of Jun's home, dark times lie ahead as a new foe presents herself: Barasuishou, the seventh Rozen Maiden. But Barasuishou is a mystery even to her sisters, none of whom have ever laid eyes on her until now. Shinku considers this a sign that the Alice Game is coming to an end, meaning the dolls will soon be forced to fight one another. Haunted by the upcoming battle and nightmares concerning another doll, Shinku begins distancing herself from the others. If she wishes to claim victory, it will come at a high cost—the lives of her sisters.

At Shirahamazaka High School, a special recital is held every year in which music students are able to showcase their talents in front of professionals and other prestigious guests. Third-year Konatsu Miyamoto desperately wants to sing in her last high school recital, but because she screwed up the year before, the vice principal has barred her from participating. That's when Konatsu comes up with a new plan to get involved; instead of joining the official choir, she'll form her own singing club with her friends! Unfortunately this proves to be harder than she imagined. Her friend Wakana Sakai has given up on singing, for one, and Konatsu needs more than just two members. With only a month left until the recital, will Konatsu be able to find enough members for her club and actually be ready to sing at one of the most important events of the school year and graduate without regrets?

In the near future when technology has significantly advanced, a famous AI TV fortune teller seemingly foresees high school student Asahi Kashiwagi's day with pinpoint accuracy. On his way to school, he encounters Aoi Izumisawa, Bai Mongfa, Karin Istel, Amelia Irving, and Ilya Ilyukhin. Despite meeting them for the first time, Asahi suddenly receives love confessions from all of them at the end of the same day, perfectly aligning with the fortune teller's prediction. As if that was not enough, Asahi soon learns that these five individuals are actually candidates to become his bride, and they have been invited by his father to live at Asahi's home. Left with no other choice, he reluctantly allows them to stay, resulting in a bawdy turn of events that brightens up his average high school life. However, as Asahi spends more time with them, forgotten memories gradually resurface. While uncovering the hidden truth, Asahi begins to believe that his fate with these potential partners might be more than just mere coincidence.