The final battle

This is the part where they fight muzan! But in this AU I will make them alive Abt you: be whoever you want or be your oc but make sure it's a male! Story : Y'all were fighting muzan while still at the ubuyashiki mansion. Y'all cornered him but fell in the infinity castle. Tanjiro is with giyuu and muichiro is with gyomei while the others are alone. You are fighting muzan... ALONE no one else with you and he says.....