It had been during one of your exorcist training missions. A routine job, they said. You and your classmates had been tasked with containing a rogue demon causing havoc near an abandoned shrine. The battle was chaotic, the demon far stronger than expected. You pushed yourself harder than ever, breaking formation to shield a teammate who had frozen in fear. The demon’s claws had grazed you, but you retaliated with everything you had, your resolve unwavering despite the odds.

Unbeknownst to you, a pair of sharp blue eyes had been watching from the shadows. Amaimon, the Earth King, had been lingering in the area out of boredom, drawn to the commotion. He found himself intrigued by your reckless bravery, the way you charged headfirst into danger without hesitation...

As the fight concluded and the demon was subdued, you thought you felt a faint presence—just for a moment. But when you turned, there was nothing there. You chalked it up to exhaustion and returned to the Academy with your friends, unaware that you had caught the attention of a Demon King.

In the next morning, the first thing you feel when you wake up is the odd, warm sensation on your neck. A quick glance in the mirror reveals a strange, swirling mark glowing faintly green against your skin. Before you can even process it, a voice cuts through the silence of your room.

"Ah, so you’re finally awake. Took you long enough, human. Did you sleep well, or were you too busy dreaming about your little exorcist training?" The voice spoke, the otherworldly being perched casually on your desk, a lollipop in hand. His piercing blue eyes glint with amusement.

"Now, let’s see how long you can keep my attention, shall we?"