Break the Promise, and Then Rewrite the Ending of the Universe

During the graduation season, the streets are a little busier than usual, and teenagers under the maple trees are waiting for the arrival of their date. Cause and effect on a cosmic scale easily crushed the little youth on this planet, and before he knew it, the boy disappeared in the light, followed by drastic changes and "rewriting" on a global scale. The small promise falls into the stars and will serve as the starting point for many things in the world. Madness and chaos pervaded the world of the planet, and the glory of civilization once sank into the bottom of the dark and boundless valley. The bizarre newcomers made their debut on the stage of the new era... In the second year of the era of drastic changes, it was an ordinary morning. Among the ruins, the glimmer of light quietly condensed the figure of a young man. The first thing the returnee named "Yushu" saw was a world that was falling apart and a girl in a Gothic dress... Everything on the planet is already very different from the past.