When I Determined to Be a Top Student

[The end of the world + infrastructure + no cp] On a dark, moonless night, after a tiring day at work, Lin Yi was lying in bed preparing to sleep when he suddenly heard the roar of an explosion in his ears. Then she lost consciousness, and when she opened her eyes, she saw comic posters all over the wall, which she had posted on the wall while she was reading. When she found out, she returned to high school and decided to become a top student. Suddenly told that the world is about to be destroyed?