"The Belldale is the realm where demons live. Through a millennium ago a human in the human realm turned into a demon trying to cure his own terminal illness and turned humans into demon, but due to the fact they are artificial demons they were weaken to sunlight. However, as time passed, the  monarchy is known as the Demon King banished demons from the human realm those that survived the fight of demon against hunans known as demon Slayer. The Demon was once chosen by being top rank,but soon as Derkila vanished, and a when new king named Furoian Zogmolan was soon chosen, the title is now given to the oldest heir of the Demon King. As the new demon king Furoian formed a law where demons couldn't visit the human world without proper paperwork filled out and the same was for any humans that came to the demon realm.The next soon to be king now is none other than Ruidan also known as Rui the oldest child of Zebuar Zogmolan the current demon king," The narrator said as the scene panned onto a  slender young pale skin demon with almost shoulder-length white hair framing the side of his face with cat protruding cat ears, teal eyes, white wings, a long cat tail, and pointed ears sitting on a large black and golden throne.

"Well, what do we have here?" A  voice said as footsteps where heard coming his way."Prince Rui," A tall satutare male with fair skin and meduim length orange hair with pointed ears and orange eyes wearing a long sleeve red shirt and a black sleeveless vest and black pants entered the throne room.

"Ah, good day Kassiel," Rui greeted as he glanced up at his family servant.

"Yes good day indeed it time for your standard check up before picking up your new clothes," Kassiel said.

"Huh?" Rui questioned.

"You haven't forgotten tomorrow the welcome ceremony at Vogerth you need to get a update on the medical records and your mother had your customized uniform made," Kassiel explained.

"I almost forgotten that was tomorrow," Rui replied as he stood up. "Will my parents be joining us to the clothing store?" He asked.

"Your mother will be out with the twins for the afternoon, and unfortunately your father is talking to your grandfather about replacing some members of his council known as the thirteen  crowns he doesn't trust anymore that were still around from Derkila time," Kassiel explained.

"I see then," Rui said standing up as he grabbed his light blue robe from off his seat putting it back on over his purple royal jumpsuit."I best not keep Dr. Tamayo waiting any longer."

"While you do that get the carriage ready to go," Kassiel replied as he left the throne room.

Rui then walked towards the medical ward of his family castle where the family medic Tamayo worked doing her medical treatments and making medications the family including the pets of the household.

~~~~

Rui was walking towards the medical ward as he heard a banging crash and growling sound coming from farther down hall behind him.

"Huh?" Rui questioned as he turned around to see a familiar brown and black dimidoodle with crested moon on its forehead and a orange and green eye pouncing at chew toy. This was Chemi the loyal pet of Ruidan.

"It just you playing around," Rui commented as he walked past Chemi and continued on towards the  medical ward.

The moment he arrived at the medical ward he was greeted by a petite feminine demon with long dark brown hair, parted in the center and worn back into a large low bun held in place by a floral hairpin. She had large gentle pupilless lavender eyes that fades dark purple higher up and red lips thatcntradt to her pale complexion.  She was wearing a  white medical jacket and dark blue pants.

"Ruidan please take a seat young man," Tamayo said kindly leading Rui towards the medical bed to seat so she could  begin his checkup.

"Yes, Dr. Tamayo he said calmly as he climbed onto the bed.

Tamayo walked over towards Rui and started with examining his ears for any signs of issues.

"Your ears seem all good no signs of infection or anything," Tamayo said." Nice and clear eyes as well  everything seems good so far, but we see your reflex are next I examine the wings last," She said.

Tamayo continued the exam and everything checked out to be in good condition."Alright your all good to go Prince  there shouldn't be any problems for school," She said.

"Great to hear now if you excuse Kassiel is waiting for me to run school errands," Rui said as he got off the examine bed and started walking towards the door.

"Yes of course my husband taking care of the same for my youngest Ramon," Tamayo replied.

"Oh yes never actually met him but seen your picture of him near your computer where you keep the medical records," He said glancing at the picture as he walked out the door."I'm sure he a interesting kid," He stated.

~~~~

Rui walked out of his home as Kassiel pulled up in front in a red carriage with a black horse with a white skull face and flaming mane and tail and red flame patterns over it body pulling the carriage.

"Here we go Prince Rui," Kassiel said getting out of the carriage and helping Rui get inside of the carriage and onto the comfortable black seats."Now we can pick up your uniforms that your mother got customized and multiple so you don't always have to wash your uniform," He explained as he got back in at the front and command the Demon horse to go.

'I wonder what kind of customizations my mother requested for my uniform.' Rui thought as he gazed out the window deep in thought.

"So Prince Rui are you looking forward to school starting up?" Kassiel asked.

"Yeah I guess it be a interesting first year," Rui replied as he saw the carriage pulling up in front of a large building that he recognized as Bloodmoon Tailoring.

"Alright here we are Prince Rui time to pick up your clothes and then we have to pick up a new backpack and your replacement alarm clock since your old one broke," Kassiel explained as he opened the carriage door and helped him out.

"Yes of course," Rui said as he and Kassiel walked into the tailor together.

"Well if it isn't the Demon prince," A grey skin demon with dark purple eyes and short white hair and twin horns sticking out of his head. He was wearing a black short sleeve shirt and red pants with purple markings over his arms.

"Melch we came to pick up Prince Rui uniforms," Kassiel sated.

"Yes of course," Melch said walking towards the back and came back with a bag with the uniforms in it."I'm sure it will look lovely on you."

Rui nodded as Kassiel took the bag from Melch."Thank you for your assistance. Now time to go Prince Rui we have a few more task to take care of."

"I understand," Rui said as he and Kassiel headed back to the carriage to run some more errands.

~~~~

Timskip...

It was now late in the evening as Rui was just finished eating dinner with his family.

He was now inside of  a large room with dark purple painted walls. A black book shelf and matching desk, and a large  red desk chair. He had a large red dresser and there was a black nightstand with a blue demon bird alarm clock on it. He had a king size purple bed with a green headrest that had demon wings at the end of it and at front of the bed was a light purple bench.

Rui was dressed in his pajamas all ready for bed as his mother walked into the bedroom

"I hope your getting in bedyou have to be up pretty early tomorrow for the welcome ceremony," She said.

"Yes I'm about to lay down now," Rui said climbing into bed and getting under the covers.

"Well night see you in the morning sleep my oldest son," Dimoda said shutting the door and leaving her oldest son to sleep for the night.

Here is the first chapter of The Prince of Demons. In this chapter Ruidan is with Kassiel getting ready for the welcome ceremony at Vogerth after getting a medical exam from Tamayo. Next chapter he will experience the welcome ceremony will he will possibly make a  friend at school. I hope you enjoyed the chapter.

Thanks for reading!

Note: This story history will have a combination of Demon Salyer and Welcome to Demon School Iruma-kun with changes given this universe and realm was was created by me so the history will have my original concept as well. The school will have some events like Babyls in Welcome to Demon School Iruma-kun but most of  events and plotline will be my original ideas given it takes place in a different realm which I created.

Word count: 1534