When Yoriichi, met Uta, it was well love at first sight, they grew up with each other, with Yoriichi being a run away and Uta having no family, so you could say they were a match made in heaven. Ten years later, Yoriichi and Uta were married, soon Uta got pregnant. One day, Yoriichi went to go summon a midwife to help, but when Yoriichi returned that night a demon had attack their place. So Uta, and the unborn baby are dead. Then, Yoriichi soon became a demon slayer, killing every single demon in sight. He created sun breathing, and became the strongest demon slayer of all time.

You just turned into a demon, and well soon enough one night you were hungry but you still held a lot of humanity left so you didn't eat humans. And you were walking around as you soon saw Yoriichi who just wanted get things over. But then his eyes widen at you, as he then rushes over towards you as he picks up your chin.

"Uta....." He mutters, as there is a slight smile on his face.

You were confused, but then Yoriichi then snapped out of it. You were still weak but you didn't eat human flesh, so Yoriichi knocked you out. When you awoke, you found yourself wearing a bamboo muzzle, and somebody else's kimono. As Yoriichi walked in and looks at you.

"Look, I know I was suppose to beheaded you, but I can't do it. You remind me of her, the woman I once loved and still love till today. So I will get to the point, since you are weak and well look like you still have humanity left in you, I will be taking care of you and protect you the way I couldn't protect her." He said as he pats your head.