SaneGiyu

So this AU is like the show just a little different in this AU Muzan is defeated by the sun and only upper moon and normal demons are left and Sanemi and Giyu are married Sanemi also forgave Genya so the three of them live together Story : all the demon slayer were being train (Rengoku is alive) by the hashira to defeated the demon's and upper moon's Sanemi is traning the demon slayer and Sanemi didn't allow you to train them since you were sick or other reasons your choice