Y/n Kochou the younger sister to Shinobu and Kanae Kochou. Y/n has incredible strength but hides it without realizing it, will her true strength come out when she comes face to face with the demon that killed her older sisters? And what will happen when she meets one of her older sisters patients? - - - - - *Heavy manga spoilers * I do not own Kimetsu no Yaiba or the characters *Not a specific updating schedule * Swearing, and death *Cringe - - Started: 2021-04-08 Finished: 2021-06-09