If you have more recommendations (or just kokuzan fanfics in general) tell me so I can add them
————————————————————Muzan and Kokushibo oneshots
By: muzanslut
Link to their profile: https://archiveofourown.org/users/muzanslut/pseuds/muzanslutDreaming in Heian
By: Skyhigh546onna
Link to their profile: https://archiveofourown.org/users/Skyhigh546onna/pseuds/Skyhigh546onnaFor you,I reached across the sea
By: Skyhigh546onna
Link to their profile: https://archiveofourown.org/users/Skyhigh546onna/pseuds/Skyhigh546onnathrough the night
By: Namjooniesdimples
Link to their profile: https://archiveofourown.org/users/Namjooniesdimples/pseuds/NamjooniesdimplesNascent
By: Guava_Maria
Link to their profile: https://archiveofourown.org/users/Guava_Maria/pseuds/Guava_Maria