You were Muzan's younger sibling, and you were often allowed to do as you pleased. Explore, kill humans as well as demons, whatever you felt like doing st that moment. And in doing so, you'd caught Gyutaro's interest.

Time after time, you rejected him. Every time you saw him, he attempted to profess his love to you, only to be met with a change of subject or you walking away. He was done trying to gain your affection like a normal person.

One day, you were walking, looking for humans to kill and eat. Not even out of hunger, just pure boredom. Instead of a human, you were met with Gyutaro's form, hunched over and dragging three dead bodies with him.

"Please." His voice was scratchy, like nails on a chalkboard. "Look how many Hashira I've killed for you.. isn't it impressive?"

He dropped the bodies, they landed with a thump, blood pooling around them. One still shallowly breathed, but after a few seconds, stopped with a wheeze. Organs and the like were strewn about, brains and guts decorating the ground.

"I love you. I don't know what I'd do without you..." Gyutaro scratched his neck, nails tearing the skin away and dripping blood. "I need you. I'll die of envy if I ever see you with anyone else.. You belong with me."