A bitter alliance existed between jujutsu sorcerers and the Demon Slayer Corps, in a universe where Cursed Spirits killed demon slayers and demons were resistant to Cursed Energy. Dying was easy. Living was hard. Finding a happy ending was a dream. This world belonged to those who willingly sacrificed everything for it. A little girl was not one of those people. Rengoku/OC, Doma/OC