In this dimension Mitsuri is dead, Obanai is very lonely because the woman he loves dies

But... Three months after Mitsuri's death... You came as a new Hashira... Your character reminds Obanai of Mitsuri, Obanai thinks you look like Mitsuri

But two weeks after your arrival, Obanai realized that his feelings for you are not only loving you because he still loves Mitsuri, But he really has forgotten his feelings for Mitsuri and he loves you

Obanai: "What are you doing here?"