Years of political tension and mistrust between the two rival nations of Zafran and Revillia escalate to the point of war. Each nations solution: to gain possession of Decimators, the same ancient robots of war that nearly ended all life on the planet 200 years before. As the war ensues and the leaders of both nations become reluctant to surrender, only the desperate plan of Lean, a young cadet, and Nataruma, a psychically gifted young woman, to alter the timeline of events 200 years before stands the chance between humanity's survival or absolute destruction.

Aileen Lauren Dautriche's life changes forever on the day her engagement with the crown prince Cedric Jeanne Elmir is nullified so he can be together with Lilia Rainworth. The event triggers Aileen's memories from her past life—she has been reincarnated in an otome game as the villainess, who is destined to die in the final act. To prevent her predetermined demise, Aileen has only one option: to court the game's last boss, Claude Jeanne Elmir—the proclaimed "Demon King" and Cedric's half-brother—and marry him. However, it is easier said than done, as Claude distrusts her intentions. Instead of giving up, Aileen adamantly tries to win his heart by helping Claude fulfill his wish: to build peace between humankind and demonic beasts. But time is running out, and it is up to Aileen to change the course of not only her tragic ending but Claude's as well.

College student Yuuhi Amamiya's monotonous life is turned upside down with the appearance of Sir Noi Crezant, a talking lizard claiming to be a knight of justice. Crezant elaborates that the world is in peril—threatened by the mage Animus who wishes to annihilate it with his Biscuit Hammer, an enormous structure suspended in Earth's orbit. As the newly appointed Lizard Knight, Yuuhi must fight alongside other Beast Knights to protect the princess and save the planet from destruction. Unimpressed by the prospect of risking his life, Yuuhi continues his day as usual—until a golem created by Animus suddenly confronts him. Yuuhi is instantly overpowered, but his neighbor, Princess Samidare Asahina, luckily rescues him. To his surprise, Samidare's intention starkly differs from Crezant's; instead of saving the world, she aims to destroy it with her own hands. Captivated by her firm ambition, Yuuhi resolves to become stronger and help Samidare realize her goal. As the pair continues to fight against Animus' golems, Yuuhi finds himself gradually gaining an interest in life—but the chains of his past trauma may restrain him from progressing further.

The beginning of the Meiji era spelled the end of the tanuki's tricks. These raccoon dogs, who are able to transform into human beings, used to love fooling humans until advanced technology rendered their endeavors futile. However, Mameda, a young tanuki girl, has not given up on this tradition, and—resolved to follow in her father's footsteps—travels to Osaka in hopes of duping people. As others in her village predicted, Mameda fails to deceive a single person, and she is even hunted down by an angry crowd. After finding refuge in a theater, she stumbles upon a rakugo performance given by a master of the art, Bunko Daikokutei. Fascinated by the vivid images created by the rakugoka's acting, Mameda becomes enamored with this style of storytelling and decides to become Bunko's apprentice! Despite her initial reluctance to take a disciple, Bunko begins to teach Mameda rakugo after witnessing the young tanuki's perseverance. Between undertaking a taiko apprenticeship, handling her work at the theater, and memorizing plays, Mameda needs to give her all if she ever plans to master the only art that still has a chance to fool people.