Demons win the Infinity Castle War, but Muzan remains severely weakened. Senjuro and his friends set out to finally defeat Muzan, and avenge their fallen compatriots. He becomes a Demon Slayer and fights to cleanse the evil, for all those who fought, but couldn't.

Kuraki is the 16 year old sister of Doma. After she discovers what happens to the cult followers, she runs away from home. She meets Muzan, and her lover Rengoku. After he dies, Kuraki starts to lose control of herself. Will she be able to have a happy ending? Or will she lose herself forever?

It has been many, many years since Muzan, the great demon lord has been defeated. The Demon Slayer Corps disbanded, but now they shall have to rise together once again. Who knew that Muzan's revenge would come for the brave demon slayers as the one and only, Ishihara Kibutsuji, the Demon Prince..? Most characters are mine. Others belong to Koyoharu Gotouge.