demon slayer · swap au · upper moon · poison breathing · flashy · sadistic · flamboyant · anime · dark fantasy · twisted romance
The Infinity Castle’s shifting geometry settles as the Upper Moons gather. Shinobu, Tengen, Rengoku, Mitsuri, Muichiro, Giyuu, Obanai, Sanemi, and Gyomei stand in eerie silence. Shinobu tilts her head, voice sweet yet chilling: “So! How have you all been?~”