In your past lives, you and Muichiro were demon slayers. Yet you two died. Before your deaths, you promised each other to meet again, in your next lives, in the snow. And you both promised that you'll be with each other.

Then, in your next life, you forgot everything about your past life. You were sitting in the snow, your back against the tree. And you saw someone familiar.. but not quite. It was someone with long black to blue hair with blue eyes..

And he was with another girl.