°<< A fathers love is stronger than any bond >> °

Tanjuro has alway been a sickly man ridden with disease. And seeing his family being devoured by a demon and being turned one himself has only made him more protective of his first and only surviving child Tanjiro.

Demon or not he promises to love and care for his young son even if it means his demise because a fathers love is stronger than any bond.

Swap Au-
Tanjuro is swapped with nezuko while everyone else stays the same as they are.