I traveled through hundreds of worlds at once

"Is this the center of this abnormal phenomenon? There is nothing special about it." On the coast of Kanagawa, a blond hedgehog-headed delinquent boy wearing a floral shirt and shorts, light blue sunglasses on his face, and a golden chain around his neck got off a taxi. He looked at the seemingly inconspicuous seaside town in front of him and muttered to himself in a strange Kyushu accent.

After a careful observation, the blond delinquent did not notice anything unusual. He turned his head and looked at a tall ponytailed girl holding a two-meter long sword who got off the other end of the taxi. "Big sister, do you feel something?"