A very AU short story in which the Kamado children have lost both of their parents and Tanjiro and Nezuko are raising their younger brothers and sisters. Sibling fluff.

To Mirabel, little Antonio is the most amazing baby in the world. But is she mature and capable enough to be a good big cousin? She doubts her abilities until the night comes when Antonio must move out of his Mami's and Papi's room and start sleeping in the nursery with her. Fluff and hurt/comfort.