Habahiro Hige awakens at his desk at work, but much to his surprise, he has become a baby! To make things stranger, Iori Wakabayashi walks in wearing a school uniform but doesn't recognize him as the baby. Upon being picked up and held by her, Hige discovers that he doesn't just have the body of a baby but the mind of one as well.

As a member of a malevolent organization, the General is tasked with invading Earth and wiping out humanity. Even an extraterrestrial being like him, however, needs a chance to rest. Not even the Rangers—a team solely dedicated to defeating the General and his colleagues—will stand in the way of him visiting pandas at the zoo, buying ice cream at the convenience store, and enjoying his well-deserved day off from committing evil deeds.

Rishe Irmgard Weitzner finds herself in a familiar situation: her fiancé is publicly breaking off their engagement, and her ducal family is about to disown her in shame. However, Rishe is not distraught; she has already had six chances to rebuild her life and chase a different passion each time. But she would always get swept up in a war and die, so now she wishes for her seventh reincarnation to be easygoing and uneventful. What Rishe does not take into account is the presence of Arnold Hein, the crown prince of the Galkhein Kingdom. He is destined to usurp the throne and become a tyrant who starts a large-scale invasion of neighboring countries. To make their encounter worse, Arnold is the one who killed Rishe in her previous life. That is why it is all the more shocking when he proposes to Rishe on the spot. In pursuit of her desired life, Rishe must consider accepting Arnold's proposal and discover the reasons behind his brutal actions to stop the war from ever happening.

Cursed by a witch, the feral and tempestuous Guideau tenaciously searches for the culprit so she can exact revenge. To this end, she joins the Order of Magical Resonance, an organization that deals with everything connected to magic. The Order agrees to work with Guideau in return for her help solving the myriad of magic-related cases occurring across the world. The Order's suave and mysterious mage Ashaf accompanies Guideau for the sake of successfully completing missions. As the pair traverses the land in search of that unknown witch, their experience with the fantastical world of magic grows ever more peculiar the further they advance in their journey.