Fics like The Flame Pillar and his Demon Bride

In the midst of his trial, Tanjirou is desperate to protect his little sister, who had become a demon upon her survival. Tanjirou was sure that his fight was a lonely one until the flame pillar steps in to help. His kindness was much appreciated by Tanjirou, and the young demon slayer wondered why this stranger was so merciful. According to the circulating rumor, Rengoku, the flame pillar has a demon for a bride!!!

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1. A good mother by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
2. Sumiko by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
3. The Fourth by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
4. Act One: First Drop by Kuroecchi (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))
5. The heart knows by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
6. Suitors by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
7. Emissary of the Moon by eclipse_exe404 (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga))
8. Revelation of Reason by OnceABlueMoon (鬼滅の刃 | Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
9. To build a nest by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
10. The special kakushi by akane_san (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga))
11. fuwafuwa by Esselle (鬼滅の刃 | Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
12. Dead end by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
13. The flu by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
14. Hashira training by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
15. What Tengen heard and what he shall not reveal (to anybody but his wives) by WildChaser (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
16. Wisteria Tears and Smiles of Sunlight by Teal_Aurora (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga))
17. Whispers to Tomorrow by mochiiru (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))
18. Protective Hashira by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
19. When Floodgates Burst by orphan_account (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))
20. Demon of the Sun by euphoricimage (鬼滅の刃 | Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))