Book 1 Demon king's son Sanegiyuu

Backstory

"Now now I'm almost do-"
The man got cut off by an axe getting shoved to his head, splitting it while killing him in an instant

Giyuu looked up and saw his sister

"Oh!YUU!"
Tsutako cried out running to his little brother's side as she hugged giyuu tightly

"N..nee-san?"
Giyuu weakly called out his vision now hazy

"I'm so sorry Yuu I should have been more faster and listen to the surrounding's I could have found u sooner!"
The braided haired girl said as she dressed the little raven

"I.."
The little boy said weakly as he passed out due to exhaustion

...

About two days  past since that recent  incident occured.., giyuu didn't want to go to often anymore as he was scared it would happen again

Giyuu woke up in the morning as he rubbed his eyes as entering the kitchen

"Good morning Yuu"
The tall long braided haired girl said as she finished the dish she cooked

"Goo-*yawn* Good morning nee-san.."
The little black haired boy greeted as he sat down on the table

"Yuu..as u know I'm getting married tomorrow"
Tsutako reminded

"Hmh.."
Giyuu hummed sadly

"I'm picking up the dress today , maybe u wanna come?"
Tsutako suggested

"Ok..."
Giyuu replied and nodded after

"Oh Yuu don't worry - why don't u Play with Kenji and Hichin?"
Tsutako said as she carresed giyuu's face with a soft smile

"Ok nee-san..!"
Giyuu said as he finished his food

The day past it was night, The stars and moon where covered due to the clouds that illuminated the small house

"Yuu can u come here here pls?"
Tsutako called out

"But I'm sleepyyyyy"
Giyuu whined with a pout

"Please Yuu i just wanna try the dress on "
The braided haired girl persuaded

"Finee"
The little raven said as he walk up to his sister to help her try on the dress, as she and him hummed enjoying the peaceful - calming silence till a crash was heard followed by a..

*Thud;*

"Nee-san..!"
Giyuu yelped as he clung to his sister's side

"... giyuu I need u too hide in that closet right now"
Tsutako whispered her tone firm and serious as she pointed to a near closet

"O-ok.."
Giyuu whispered as he ran up to the closet got in and closed the closet door but a small crack was vissable and he could still see his sister standing there as she pulled out a knife she was shaking but stood her ground

Giyuu watched as a demon entered the room

"My ~ My~ don't I have a nice feast tonight ~"
It grinned licking it's lips