When you and Iguro were kids, you made a promise to each other: "When we grow up, we'll get married". But then you changed city...after many years you returned to the city where Iguro lived, everything had changed...But Iguro did not recognize you. You are a Hashira now, like him. After many years of work the fight against Muzan has arrived. Some died..but some survived, and among them were you and Iguro but...when you returned to the Butterfly Mansion you found Iguro and Mitsuri hugging each other...He broke the promise...