Fics like Black Sun (Adopted from RulerOfTheCosmos)

Tanjirou was something forbidden. Something that should not have existed. Something that was the key to defeating Muzan. Son of the demon progenitor, Muzan Kibutsuji. Son of the most powerful demon slayer in history and the first user of the breath of the Sun, Yoriichi Tsugikuni. Son of Good and evil. Son of Yin and Yang.

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  1. to be special by frogsterz (鬼滅の刃 | Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga))
  2. The train by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  3. finding a home by kagshina (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  4. Admirers are fools in their own right by orphan_account (鬼滅の刃 | Kimetsu no Yaiba (Manga))
  5. 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))
  6. Hidden In The Sand by Strawberry_Angel (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))
  7. Safety First! by Chowybunga (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), demon slayer - Fandom)
  8. A bit of hope by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  9. The Sun hashira by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  10. River Carved Valleys by LovelyDayForIt (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  11. For a moment by BluishLady (鬼滅の刃 | Kimetsu no Yaiba (Manga))
  12. Aeons Of A Bleeding Heart by vylat (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga))
  13. a million watt smile by serasty (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))
  14. uphill both ways in five feet of snow by palimpestbell (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  15. You Hold My Feelings In Your Palm by sleuthlaw (鬼滅の刃 | Kimetsu no Yaiba (Manga), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  16. Terrifying by silverynight (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  17. ignite by kagshina (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime))
  18. Breath of a Bedroom by pinkichor (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Kimetsu no Yaiba (Manga))
  19. wedding boars by transatem (鬼滅の刃 | Kimetsu no Yaiba (Manga))
  20. A serpent, a snake, and a river by cloveliest (鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Anime), 鬼滅の刃 | Demon Slayer: Kimetsu no Yaiba (Manga))