Isekai de Pension Hajimemashita. Sekai de Yuiitsu no Kuromajo desu ga, Kono Chikara wa Okyakusama no Tame ni Tsukaimasu.

Tragically cut down in a workplace fire before she could fulfill her ambitions, a young woman’s final thoughts are consumed by the lingering desire to achieve everything she had yet to experience. However, death is not the end of her story. She awakens in an entirely different world, reborn as a black witch—a being of immense and rare magical standing. Guided by her new master, a mysterious talking black cat, she learns that the abilities bestowed upon black witches are formidable enough to reshape the very fabric of reality itself. Yet, despite possessing power capable of altering the world, this extraordinary witch harbors no grand ambitions of conquest or cosmic change. Instead, she holds fast to a deeply personal dream: opening and operating a welcoming boarding house. Rather than wielding her unparalleled magic for destruction or dominance, she dedicates her newfound abilities to hospitality. Determined to create a haven where any traveler, regardless of their background or nature, can find comfort and rest, she sets out to build the ultimate guesthouse, proving that even the most fearsome magic can be used to bring warmth and joy to others.