Yugioh Arc V Au. A pact with the devil

The first day.

"I look ridiculous!" Declan sneered annoyed as he were staring in the mirror in front of him.

He was currently wearing a pair of white pants and undershirt and were currently barefooted. His grey hair was messed up a lot since his contractor had tried brushing it earlier. This was the result. All which made Declan grimace as he glared back at his image. Of all the colors his contractor had to use it had to be white. White was an angel color! Something he had pointed out a lot, but of course this Gili didn't care about his complains and expressing himself otherwise only earned him chained to the floor in painful matter. That was something he looked less forward to than spending time with this weird girl. And weird she was. Declan had been contracted to all sorts of contracts throughout his lifetime. That was inevitable being a demon and all. Although being a noble also prevented that for long too. Usually the contractor was to weak and Declan could easily kill them, or their contract was a short errand, like killing someone. Short by annoying, nonetheless. That and humans lost the ability to even do demon rituals these days. He hadn't been summoned for a couple of centuries and that was fine by him. However, then this girl comes around, being a completely newbie, and binds him with the most powerful contracts he ever seen. Not just binding one of his demon forms, but all of them. What was even worse he had to protect her from any danger and Be her friend, until the day She died. How fair was that?! She was a human teen for damn sake. They don't just knell over by old age anytime soon. 100 or less years bond to this girl. It was literally his own hell here.

"I found some more clothes" he could hear Gili say as she entered the room, who Declan clearly could see as her bedroom. In her hands she was carrying a piece of cloth and a pair of white shoes. Declan growled annoyed inside.

"I don't understand why I have to go with you to this human school" He uttered in his distress glaring at the girl "I do not need to be present to protect you...".

"I know that, but..." His human said and blushed slightly for unknown reasons.

That until he noticed what she was staring at. Dressed in only an undershirt, his neck, bit of his chest and arms were visible, showing his muscled body. Declan rolled his eyes. It was not the first time a human, no matter gender, found him attractive.

"Bow down please, so I can get this on you" Gili then said forcing Declan to his knees without warning finding his human less than a meter away from him while trying to get a dark blue sweater over his head.

"Or not" Declan mused to himself "She was just embarrassed giving me an order". Not to say that this moment wasn't weird enough as it is.

"...But how do we explain anything if I get attacked and you just appear out of the blue. Just like that" Gili replied as she got his head through the right hole in the sweater, making them both stare into each other's eyes. Her blue eyes were sparkling.

"Besides School can be fun. You even learn a lot...".

"Yeah I am sure I learn a lot in your human school" Declan snort sarcastically and turned his head away. His left arm went into its sleeve "We have demon schools too and I graduated being the best in my class. I have no need to enter yours with you. I will be in the shadows. No one will see me...".

"But I want you there. So just... Just shut up!" Gili uttered in pure distress and Declan could feel the chains wrap around his throat, forcing him to stay silent. That didn't stop him from coughing like crazy though.

"Ah no, I didn't mean it like that!" Gili uttered as he could feel her try to pull the chains off him. It only made it worse. Declan made a sign for her to speak. To state an order. That was the only way she would get them off him,