In 1889, the world is on the pinnacle of great discoveries in technology. In mankind's grasp for the future, a sinister foe known only as Gargoyle, obsessed with restoring the former Atlantean empire to the glory it once held, begins his plans to take over the world. Nadia, with the help of a young inventor, Jean Roque Lartigue, and Captain Nemo of the submarine Nautilus, must fight to save the world from Gargoyle and Neo-Atlantis. Based on the Novel '20,000 Leagues Under the Sea' by Jules Verne. (Source: ANN)

In any competitive cheerleading contest, it is almost certain that Kanata Misora is going to be the star of the show. As a member of the winning squad in Japan's middle school cheerleading nationals, she joins Takanozaki Prefectural High School with her friend Megumi Kaionji intending to seek glory once more. However, following an incident at a competition, she loses touch with her talents and never returns to the club for practice. While despondent, Kanata ends up spotting internet sensation Suzuha Obunai parkouring with an impressive level of athleticism and ends up befriending her in the process. Through Suzuha, Kanata meets Anna Aveiro and Nodoka Ootani, as well as Suzuha's classmate Tanizaki Shion—each carrying their own talents that apply to competitive cheerleading. Gathering through sheer coincidence, the six girls now work together and cheer each other on to chase their unique dreams.

Thanks to Professor Yuuko Kouzuki's technology and Kasumi Yashiro's psychic powers, Cadet Takeru Shirogane travels back to his original world. With no time to lose, Takeru aims to enlist Yuuko's help in his world to complete the Alternative IV project—the last hope humanity has against the BETA, an alien species invading the planet. As the anti-BETA project nears completion, Takeru and other cadets graduate from the Yokohama pilot training academy. However, during a test of the new operating system for the Tactical Surface Fighters—the giant combat suits used by humanity against their adversary—the BETA ambush Takeru and his team. Barely escaping with his life, Takeru is left traumatized after witnessing the cruel death of one of his close friends. Losing his will to fight, Takeru flees back to the other world, where he experiences a similar tragedy. According to Yuuko's theory, people from parallel universes are bound to suffer the same fate. As a result, Takeru must overcome his trauma if he wants to protect the ones he holds dear.

During their stay in the capital of Milishion, the adventurers of Dead End decide to split up for a day to run their errands. While Rudeus Greyrat has his plans derailed by a troublesome scene, the party's swordswoman, Eris Boreas Greyrat, finds herself with nothing to do. Deciding to embark on an adventure to slay goblins, Eris crosses paths with a cocky but talented mage named Cliff Grimoire. Though Eris refuses his company, Cliff stubbornly ignores her wishes and dares her to explore the perilous forest surrounding the city. Accepting his challenge, Eris ventures into the forest with the mage, where the two encounter something far more repulsive than mere goblins.