In a different world with strong spiritual energy, Wang Baole, a warm and cheerful little fat man, saw through the illusion created by the teachers in the entrance examination of the famous school "Dragon Taoist Academy", and won high scores with his excellent performance, and obtained the "Magic Department". The quota of specially recruited students has since overcame obstacles and opened up his own way of upgrading. In the process of cultivating immortals and fighting monsters, he made a large number of close friends, and thus started a series of hilarious adventure stories.

The innocent Nagomi Wahira has always admired the cute girls serving at maid cafes. Hoping to fulfill her dream of becoming one, she moves to Akihabara to work at the maid cafe Ton Tokoton. Nagomi's first day seems completely normal—until she has to run an "errand" at a rival maid cafe along with her fellow recruit, the mature Ranko Mannen. There, things quickly go south, and Nagomi soon gets her first taste of Akihabara's violent maid wars. As she watches Ranko calmly battle her way through a horde of gun- and knife-wielding maids, Nagomi realizes that maid cafes are drastically unlike what she had envisioned. While struggling to reconcile her expectations with the harsh reality she finds herself in, Nagomi searches for the enjoyment she once saw in the lives of maids.

For generations, the Bernstein family has been recognized as a house of nobles who favor books over everything else. Elianna Bernstein, daughter of a baron of the Sauslind Kingdom, is no different. But instead of being called a bookworm, she is known as the Bibliophile Princess. Four years ago, the crown prince, Christopher Selkirk Asherald, offered Elianna a special arrangement: if she would become his fiancée, he promised that she could continue to spend all her free time reading. Despite having to inherit a title of great responsibility, she agreed to the proposal, enticed by the prospect of gaining access to the royal archives housing a wide selection of books. To this day, Elianna firmly believes that her engagement is void of romantic sentiment. When she notices Christopher's interactions with another girl, she presumes that the days she spends with him will soon reach an end. Yet, during this period of uncertainty, Elianna and Christopher open a new chapter in their relationship, gradually uncovering their genuine feelings as they grow to better understand each other.

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.