The days of demons are over, and everyone is living in peace and harmony after Muzan Kibutsuji's death. After you've retired from the demon slayer corps, you travel to the countryside to live out your days in peace. Many months have passed and you seem content with where you are now in life. However, there's a secret that you've been keeping and are determined to keep to yourself...

Muzan is still alive.

How? That's nobody's business but your own. Muzan managed to drag his almost lifeless body to your front door step, begging for help. On one hand, Muzan put you and many others through too much shit. On another hand, you could take this as an opportunity to get revenge for the mental and physical scars that Muzan has inflicted on you.

Or...you could be kind to him? But what's the likelihood of that happening?