My Brother Was Cheated at the Beginning, How Come It Was Aimed at Me?

[The fourth natural disaster + slow growth + single female protagonist + no system + villain] Listen to me, this world is not normal anymore... Just yesterday. As a part-time worker at an unscrupulous hotpot restaurant, I saw with my own eyes that a good brother was "dumped" by his girlfriend who was leaning against a rich brother. Then, as a licking dog, he... Well... Forget it, it's not important... It's ridiculous anyway. Today, a classmate actually pulled out a pistol and forced Teacher Bingshan to "take" four hostages and asked: "Teacher, why is the real world different from the one in the textbook?" "Why is the only hot weapon left now, the pistol?" "What are you hiding?" ... As the flesh made a dull sound, the incident ended... In the principal's office, I watched curiously as Teacher Xie took out an unclear photo. It was a ruin, with a dark background and a monster that made people lose their sanity. Their bodies are black, with four bright red eyes, four unevenly bent arms and a rickety back. The blood-red eyes stared straight at the person taking the photo... So, is this what a world without nuclear weapons will be like...