after the Final Battle against Muzan Kibutsuji and the other Upper Moons, with the death of all the hashiras expect Tengen,Giyu and Sanemi who this last two will die at 25 dual their slayer mark, Nezuko and you have been engaged for 8 years now, and now Zenitsu hates your guts. One day, You pass a mountain path when you see an old wooden house, Nezuko remembers her past again..