Creating The "Perfect Sound" In A Silent Realm

While Shirohige was preparing for the third challenge, he noticed that the scenery was changing.

Unlike the previous sceneries where it was a nighttime ocean or a daytime forest clearing, it was an empty realm this time.

As for why it's called an empty realm, the space around Shirohige seemed to stretch infinitely in all directions, devoid of any defining features or landmarks.

The ground was a smooth, featureless expanse, neither earth nor stone, but something in between, with a muted, grayish hue. The sky, if it could be called that, was a uniform expanse of pale, colorless light, giving no indication of day or night.

In the center of this void stood a grand piano, a solitary beacon in the desolate expanse. Shirohige was seated on the piano bench, his fingers poised above the keys.