"𝗦𝗼, 𝗱𝗼 𝘄𝗲 𝗵𝗮𝘃𝗲 𝗮 𝗱𝗲𝗮𝗹?" ═════════•°•👁⃤•°•═════════ What happens when (y/n) Cipher gets teleported to a world where demons terrorize humans on the daily and meets a kid who has a sister that's one of them? Will she help him and his alias, or will she take over the universe with the help of a certain demon king? (I suck at descriptions :/) ═════════•°•👁⃤•°•═════════ This is a Fem!Bill Cipher Reader x Various!Demon Slayer story Both Gravity Falls and Demon Slayer (Kimestu No Yaiba) DO NOT belong to me, they belong to Alex Hirsch and Koyoharu Gotouge respectively. Enjoy!All Rights Reserved