Infinite Demon Travel in Another World

An extraterrestrial stone fell into the solar system, causing ripples in the human world like a small rock falling from the sky. A high school student who was eating melon happened to become the center of the whole incident. His original life was broken by stones falling from the sky. Before he could struggle in its vortex, he was hurriedly sent to another world. But..., Fortunately, the plug-in is still there. But... Why is it a skeleton?