Aozawa was testing the cooldown time of Global Travel. According to his tests, the cooldown time for Global Travel was about an hour after a round trip. This cooldown time could be considered the longest among the superpowers he had acquired since obtaining his abilities. However, considering the distance covered by Global Travel and the fact that his language translation ability was not weakened, just the number of uses, there wasn't really a problem.
He used his Global Travel ability to jump from Tokyo to New York. The sunny city was rapidly replaced by one enveloped in nightfall, with dazzling neon lights decorating New York City like stars. People of all colors walked on the streets of New York, forming a beautiful scene.
Aozawa wanted to select powerful individuals and bestow the Sound of Everything upon the weak, to observe what would happen when the powerless received this strength. And whether the duration was permanent, as he expected, as long as it was not stripped away.
