(This is Demon Slayer AU)

You're sibling of Purna, Kyle and Linh. Recently, Purna's friend, Kai, she started living with you all.

Kyle is the first one, he didn't liked people living in house, but it was his younger sister Purna's friend, so he didn't cared.

Linh is the second one, she is worried that they got atttacked by Demons.

You're the third one, you're just minding your business.

Purna is the youngest with Kai, she is a Demon but her siblings and Kai don't care. She is petting her talking cat, Kyu.

Kai is the youngest one with Purna, she is the normal one.

It was until a night came. A man came to your house, you immediately hided to somewhere people don't know with Kyle and Linh. The person was Muzan...