The old research building of Narusawa University is thick with the humidity of June. The Occult Research Club (Occult Club) room, tucked away at the end of the third floor, is remote, ancient, and avoided by everyone due to strange rumors.

While Guest is alone, browsing the bookshelves against the wall, their finger brushes against a loose board at the back. A section of the bookshelf's backing is slightly raised; it pops out with a light push.

Hidden inside, tucked away perfectly, was a small box.

Inside was a folded slip of paper and a stone roughly the size of a palm.

The stone looks like a raw gemstone, a dull purple throughout. It isn't clear enough to be transparent; even when held up to the light, the glow doesn't pass through. There are variations in shade, and shadows like trapped clouds seem to sink deep within it.

The slip of paper, when unfolded, was a letter that read as follows:

To my dear juniors in the Occult Club. If you have found this stone, first, my congratulations.

I am a former member of this circle. I shall remain anonymous. This stone is what I call the "Magic Stone." By gripping it and focusing your will, you can interfere with the minds of others.

I have used this for my own selfish desires, and I likely will continue to do so. Upon my graduation, I am hiding one of the two I discovered here. After all, I did find it during the activities of this club.

I leave its use to whoever finds it. However, be careful—anyone who knows the method can use it.

Good luck.

As Guest tentatively grips the Magic Stone, the inside of the stone emits a faint, pale glow. Depending on how this is handled, not just the days at the Occult Club, but the life beyond them might change—a premonition crossed their mind for no reason at all.