The Third

In a sky where the sun had not risen, naturally there was no such thing as the sun setting. Instead, like flipping over a sheet of paper, the world's colors changed in an instant. It took less than a second for sunset glow to settle over the blue sky.

“…….”

For a moment, the Hollow Earth theory crossed his mind. A stupid conspiracy theory claiming that a world similar to the surface existed inside the Earth. It was nonsense no less ridiculous than the flat-Earth theory or the donut theory, but Mystery was the kind of thing that would greedily swallow even that bullshit and make it real. Maybe a conspiracy theory drawn in by the grimoire's aura had settled here.

‘The Hollow Earth theory is the conspiracy theory that there is a world, complete with a sun and all, inside the Earth. Maybe the Earth stole the sun that originally existed.’

Of course, it was just a hypothesis, and even if it were true, it wouldn't be a problem. He had no intention of drilling through the mantle and going underground anyway. Just find the grimoire and deal with it, and that would be the end of it.

The problem was that, with the sun gone, the school had lost its yang energy.

Since ancient times, the sun has symbolized yang and the moon yin. Thanks to that, yang energy was strong by day and yin energy at night. But in this space there was no sun, only the moon hanging quietly overhead. It was a moon that did not reflect sunlight, but shone of its own accord.

Lone Moon.

The lonely moonlight, with no source to give it light, was driving away the sunset glow and dyeing the sky black. Like ink spreading across a sheet of paper, the sunset was being swallowed by the night sky and disappearing.

Ian stood in the school's playground, silently looking up at the scene...