Something was wrong with Yukio. Rin was sure of it.

Rin studied his brother carefully, from the moment he stepped in the classroom he knew there was something off. Yukio almost seemed cold to the class, he acted like he just wanted this class to be over with. Rin discussed this in a whisper with Shiemi, but appearantly Yukio was just fine to her. Rin knew better, he's lived with the little genius for fifteen years, he knew when something was bothering his twin.

Yukio was feeling guilty and he didn't know why. He didn't like it one bit. Was it because you might be a demon? Maybe because he's seen his brother making moon eyes at you during class when he thought no one was looking? It didn't matter, one thing he knew he had to do was confront you after class. He needed to know if you were a demon. No matter the consequences.

Yukio called the end of class, but rather than leaving the classroom he instead took a seat at his desk. Everyone was perplexed at this odd change of pace, but they slowly trickled out anyways. Rin stopped to see if everything was alright with his twin only to be dismissed with a vague answer.

You were the last to leave, feeling that was what he wanted. Just as you were about to step into the hallway his voice stopped you. "Miss (y/n), can you come here for a minute?"

You turned around with an inquiring gaze.

He regarded you with cool, calculating eyes. "Close the door please."

You did as you were told before making your way over to stand at the corner of your teenage instructor's desk. He stood from his chair before pulling a pistol from beneath his trench coat and leveling it with your forehead.

"Yukio, what are you doing?" Your eyes widened with a timid voice, but you were cursing on the inside.

"What are you?" He asked, the glare from his glasses obstructing his eyes.

"Wha-what do you mean? I'm just a girl, an exorcist in training!" You cried out, tears brimming in your eyes.

Not taking his gaze from you he reached for a flask from his pocket before uncapping it and pouring a puddle of holy water on the desk. "Then draw a cross on your forehead with this holy water. That is, if you can."

You gritted your teeth, eyes flashing dangerously. You let out a sigh of defeat before chuckling, Yukio's grip on the gun tightened.

"Alright." You raised your hands in mock surrender. "I know when I'm found out, lies won't help me anymore. Before you start shooting, I'm a guest of Mephisto's. He asked me here to help him out with a few things."

He pulled back the hammer on the pistol, the click ringing ominously in the quiet. "What kind of things?"

Before he knew what happened, you were gone. His eyes went wide at the feel of arms wrapping around his waist from behind. Your plump lisp brushed along the shell of his ear, nipping lightly at the lobe.

"You, Mr. Okumura." You whispered.

He breath caught as you sucked at the lobe of his ear, sending erotic chills down his back. The grip on his firearm loosened before he clenched it tight again and jumped away from you. He put you in his sights again. "What does Mephisto have planned?"

You laughed lightly, boldly walking towards the exorcist again. "I'm afraid I can't tell you that, but you don't have to worry, no harm will come to you or the order."

"And before," he narrowed his eyes. "in school, that was all an act?"

"Not exactly," You shrugged nonchalantly. "That was how I was before I became a demon. How I was when I was human."

"It's a shame you're not still human then." His voice was full of ice.

You smirked at him. "So cold, Yukio, why don't you just give in to me?"

He gave you a scowl. "Never."

With a laugh you disappeared. Yukio's eyes frantically searched the shadows of the classroom for your form, all he got was you teasing voice fading into the distance.

"Until next time, my little exorcist~."