(Demon Slayer and Crossover) My Special Ability Is Healing

By day, she's a student living a quiet life in modern Yokohama, with the occasional little surprise. Her life is just a bit of a mess. By night, she's a renowned physician in the Heian era, though there are a few too many demons and ghosts around her. The great onmyoji Abe no Seimei, once her idol, is her friend. Tamamo no Mae, once her strongest ally in a mobile game, is still her strongest ally. A certain demon king, once the most timid villain in history and now reborn, is her patient. The reborn, once-timid demon king: I hereby declare that this little doctor is mine! No one else is allowed to compete with me! Lin Wei: Meow meow meow??? Lin Wei really likes her sickly patient. He's incredibly handsome. She likes him so much that she rushes to deal with the mess of her daytime life, then hurries back that very night to nurse him back to health. But by accident, she ends up dragging him into a different era's dungeon. Just as she's reflecting on her actions and deciding to treat her patient even better, Lin Wei realizes they've somehow become caught up in a strange incident. She looks at her patient, whose face is exactly the same as a certain villain's. Lin Wei: ... Lin Wei: I can't lump everyone together. At least my patient is still a "person." A certain reborn demon king, patting his chest in lingering fear: ... (Good thing I hid my secret identity well.) A certain reborn demon king: I'll kill myself! P.S. There seem to be so few stories about Muzan. There's not enough to read, so I can only write one myself. Theme: The best way to save the most timid villain.