Sylvie was miserable. And it wasn't just because of her name, which sounded like that of a slave girl. The fantasy RPG "The Strongest Witch of Another World ~The Shining Light to Save the World~!" sounded like a terrible game, and Sylvie's only redeeming quality was her status as the strongest witch. Logically, she should have been on a romantic journey, spending her days with girls and ultimately saving the world. But then she was told the world was going to be destroyed in a thousand years—what the hell? Then she was told she was late in her transmigration, so the world would be destroyed in a few months—what the hell? Then she was told she was the strongest witch, but her witch powers could only be learned by herself—what the hell? This pathetic witch, reduced to a couch potato, could only laze around all day, hanging out with pretty girls, waiting for the meteorite to strike in a few months...

"I'm going to send you all to another world, just for fun," the pure white goddess said, using a heavy truck to transport the entire school, including Sachiko, to the other world. Without any goddess's protection, Sachiko, having just physically transmigrated, found herself besieged by monsters at her school. It was the worst possible start to her transmigration—or so she thought. Until she met them. The eldest and second princesses of the human empire; the golem maid with the heart of an ancient god; the youngest ancient dragon born in the Second Era; the snow witch who witnessed the death of a god; and the demon king gathering an army to flatten the entire continent… Sachiko realized that she had transmigrated into the world of an old RPG game she had played long ago, *Shadow Book*. The good news was that all six female characters Sachiko had romanced in the game remembered her. The bad news was that they all made explicit demands for Sachiko's "ownership." Thus, unlike her classmates, and instead of "hardcore mode" or "story mode," Sachiko activated her own hidden difficulty—"soft rice mode."

When a cute, cuddly catgirl meets a cool, aloof school beauty, an unexpected event brings them together. The catgirl's charm and adorable antics gradually melt the school beauty's icy exterior, while the school beauty's attentive care makes the catgirl feel the warmth of home. From initial dislike to inseparable companionship, their daily lives are filled with sweetness and laughter.