[Anime Crossover] A Setting Error

As a transmigrator, isn't being a Mary Sue only natural? Looking at the dark-skinned guy in front of me, who was born from the same mother as me, I can't help sighing. Can't you just let me be a happy slacker? Chihaya, girl! Sign a contract with us and become a magical girl... cough, cough, a Saniwa! Chihaya: This world is terrifying. Please let me go back home. Akashi: Chihaya, come back into my arms. Pairing: Seijuro Akashi. The male lead has a weak presence. [ A few things to know before reading: This crossover mainly includes Detective Conan, Touken Ranbu, Kuroko's Basketball, and other stories, with various characters popping in from time to time. Everyone may be out of character. These are late-night ideas with no outline, so enter at your own risk and enjoy it while it lasts. The author is a casual Touken Ranbu Saniwa. Please let me know if any details are wrong. If they're the author's own headcanon, it'll be mentioned in the author's notes. The female lead's citadel has no dark citadel or corruption storyline. All the swords are elders doting on the Saniwa, with various pairings possibly mixed in, so please read with care. Finally, happy reading! ]