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Mysteria Academy is a prestigious magic school that teaches magic without discrimination to the three factions (men, gods, demons), who usually are engaged in battle with each other. Two of the academy's students are Anne, a princess and honor student, and Grea, a princess born from a dragon and a human. (Source: ANN)

In a world where humanoid armored weapons known as "Titatonostrider" ("TS" for short) are used in warfare, troops from various countries converge on the island of Oahu, Hawaii, including Ao Isami of the Japan Ground Self-Defense Force and Lewis Smith of the United States Marine Corps. Isami and Smith cross paths during battle, but suddenly, their teams are attacked by an unknown enemy, scattering soldiers and sending their forces into disarray. In order to save their friends and survive on the deadly battlefield, they must fight with every ounce of courage and pride that they can muster. (Source: Crunchyroll News, edited)

In 2022, a powerful weapon causes a global blackout that has massive implications all over the world.

In the year 2157, Gingarou Hotel, a luxury establishment in Ginza, Tokyo, employs advanced hotelier robots to provide best-in-class hospitality. Unfortunately, no one has visited the hotel in decades, as humanity has long abandoned Earth due to its toxic atmosphere. Yachiyo, the robot "acting acting manager," works tirelessly every day alongside her mechanical crew to keep the hotel running in tip-top shape. Over the years, many employees have ceased functioning, with no hope of repair or replacement. Still, Yachiyo continues to fulfill her duties, just as she promised the hotel's owner before his departure. She remains optimistic that humanity will one day return to Earth—and that she will see the owner again. [Written by MAL Rewrite]