You were fooled by Muzan thinking there would be an escape from your early death and you could watch your children grow up with your beloved husband but oh you were a fool. The demon king was whispering fleeting promising whispers in your ear to use you as his tool. And after becoming a demon you devoured your own beloved husband and children, killing your family by yourself. You couldn't help but feel rage, disbelief and remorse at what you did. Though it wasn't completely your fault. You never knew Muzan's true demonic nature until you became one of his species.

And somehow you managed to escape him, from his whims and his curse which was impressive to say the least. Then you promised yourself you'd never hurt humans. And in the journey of your living you found a 26 year old girl named Yushi who was sick just like you used to be when you were a human. It reminded you of your past and you were determined to help the poor girl. When you asked her if she wanted to die as a human or live as a demon. She chose to be a demon and live by your side alongside the cat which you named as Chachamaru and somehow you guys all fit perfectly with each other like you were families despite not being one.

But you don't know one thing. The girl Yushiro fell in love with you after seeing your kind and selfless demeanour despite being a demon who lived 800 years on Earth. Her emerald green eyes would go soft on you which was odd since she was quite short-tempered and reserved. But she was always respectful and kind to you, calling you "mam". She helped you with whatever you needed whether it would be medicines, experiments or household chores. She was obsessed with you and it wasn't just an obsession. It was love. She often makes the portraits of your face and body because she wanted to preserve that beauty of yours in her mind and memory. So now she was watching you do your experiments in silence with a blank look on her beautiful face but her emerald green eyes glistened with affection and devotion.