Prologue
The bishop was alone in the meadow. There was no other creature in sight. The wind playfully blows the bishop's dark hair and robe, but the man stood still, unaffected. The sky was clear blue with fluffy white clouds marching in it. It was one perfect fine day and the lawns looked so green and gentle, as if inviting people to lie down and relax, watching the sky and feeling the soothing breeze. However, relaxation was far from the bishop's mind.
The bishop looked young and charming, but there was strain and tension in his perfectly carved face. On his waistband were two crystal balls, one emitting golden light while the other was nothing but plain ball of glass. Other than those two crystals, the bishop had nothing with him.
The bishop raised his right hand. A weird bluish symbol glows on it as he mumbled inaudible sentences; a spell. Suddenly, a hole began to open below his feet. Blinding golden rays came out and covering the bishop's body; as if it was devouring him. Then nothing but the shining hole was left in the meadow. The bishop was gone.
***
Hisagi unwillingly lifted his eyelid. The bell would ring soon. He had no choice but to wake up. Scarcely had he seen a figure in weird robe-like clothing passing by. Hisagi blinked. The figure was no longer there. He decided it was just delusion. He had just woken up after all.
Hisagi stood up from the grass where he lied. Then he noticed a weird glowing glass ball. He was sure it wasn't there when he'd come to the school backyard to take a nap. Had somebody dropped it? But Hisagi wasn't even sure that kind of thing ever existed. He picked the ball up and stared at it for a moment. Magically, the ball jumped from his palm and floated in the air. It glowed even brighter, engulfing Hisagi in golden light.
Hisagi was surprised. Could he still be sleeping? He must have dreamt the shining, floating ball. It's not the sort of thing that could happen in reality. But it felt so real. The ball's light felt warm around his body.
Suddenly everything when white. Hisagi was blinded for a second. Then the light disappeared. The ball fell to the ground and stopped glowing. Instead, there was a circular golden mark on Hisagi's right hand. I must be still dreaming, Hisagi thought.
Then he saw something that definitely hadn't been there before; a large hole on the ground, shining brightly in yellowish ray. Hisagi looked at the hole with disbelief. He definitely had never dreamt anything this weird before.
Hisagi felt a strange pull. It's as if the hole was inviting him to come closer. He did so. However, Hisagi stepped too close. The yellowish light engulfed him and sucked him into the hole leading to mystery.