Private detective Sousuke Kaburaya is simply trying to make ends meet when Sara da Odin, an imperial princess from another world, falls through a portal right on top of him. Unaware that she is an anomaly in a magicless world, Sara uses powerful spells in public, causing a commotion and forcing Sousuke to take her back home with him. With the help of the internet, manga, and modern Japanese conveniences, Sara grows accustomed to living in Japan and becomes Sousuke's assistant in the process. Meanwhile, Livia de Udis, Sara's personal knight, also comes through the portal but lands at a different location. There, she meets a homeless man who readily accepts her unique background and odd tendencies. Despite her situation, Livia quickly adapts and settles into the homeless lifestyle, a far cry from the noble position she used to hold. While Sara and Livia may be living different lives, their positive and ambitious attitudes leave a lasting impact on the people around them as they experience both the good and bad of Japan.

Mahoro Andou is a powerful combat android designed by Vesper, a secret organization protecting the world against alien invaders. Unfortunately, her remaining operational time is running short. If she continues to fight, she will shut down in about one month. However, if she chooses to avoid combat, she can live freely for over a year. Suguru Misato is a high school boy who lives alone in a large house left behind by his late parents. Like any other boy his age, he has trouble taking care of the house on his own, so he decides to enlist the help of a maid. His problem is solved in the most unexpected way: when a couple of thugs hijack the bus he is riding, a young, beautiful girl wearing a maid outfit saves the day. It turns out that this girl is Mahoro, who has chosen to live her remaining days as Suguru's new maid. Mahoro makes the best of her remaining time and develops bonds with Suguru and his friends during their peaceful yet lively everyday interactions. However, Mahoro is hiding her true intentions behind becoming Suguru's maid, and it seems that their pasts are more intertwined than Suguru realizes.

On her way to meet friends for drinks, Kaoru Nagase suddenly collapses. While attempting to fix a distortion in the space-time continuum, the god managing Earth made a mistake that resulted in Kaoru's death. Fortunately, the god preserves her mind and soul, granting her a second chance at life in another world, Verny. To make up for this divine error, Verny's goddess Celestine provides Kaoru with various blessings: a youthful body, proficiency in all languages, an item box with infinite storage, and—most importantly—the ability to spontaneously create any kind of potion, limited only by her imagination. However, her powers prove too advanced for a medieval world like Verny. As she tries to enjoy her new life and escape those who covet her abilities, Kaoru travels across different nations—but the bits of influence she leaves behind may soon amass into something out of control.

Saenome are tasked with sealing spirits that possess objects and pose a threat to society. Known as tsukumogami, these spirits are generally non-violent, and saenome normally seal them after a simple verbal exchange. Traumatized by a previous deadly encounter with a malevolent spirit, Hyouma Kunato refuses to use peaceful methods and gets into physical confrontations with all tsukumogami that cross paths with him. Deeming this behavior unacceptable for a future clan leader, Hyouma's grandfather, Zouhei, proposes that he starts living with Botan Nagatsuki, a young woman whose family is composed of six tsukumogami—lest he be excommunicated. Determined to track down the spirit that took everything from him, Hyouma reluctantly accepts Zouhei's proposal. As unknown groups of evil spirits begin to jeopardize the balance between worlds, the young man must gain the trust of Botan and overcome his hatred for her mysterious family.