Lin Mo, a problem student in Jiangcheng No. 3 Middle School, is good at fighting. He is a thorn in the eyes of teachers and a waste in the eyes of parents. Until that day, he accidentally activated an incomplete "interstellar anti-intrusion system" on the school rooftop - this was a super system that was supposed to maintain peace on earth, but it had serious bugs due to unknown reasons.
What's even weirder is that in the "Intruder List" that appears on the system panel, the principal, dean, school belle, top student... These campus characters he gets along with day and night are all lurking alien spies! System bugs prevented him from using his functions normally, and instead gave these aliens various strange abilities.
When all mankind is kept in the dark, and when the alien fleet quietly approaches the earth, this little gangster, who no one is optimistic about, will start a ridiculous and passionate counterattack on the middle school campus with the help of a BUG system that everyone considers a "waste". He wants to prove: The system can have bugs, but I can't be a coward!
