Gao Zuo was a shut-in in the real world. With help from a good friend, he obtained a treacherous System and transmigrated to another world.
Gao Zuo: What? I'm invincible?
System: That's right.
Gao Zuo: Being invincible from the start? This is amazing!
System: Although you're invincible, your existence is tied to your academy's level. Once it reaches level 60, you can leave and return to reality. But if it falls below level zero and goes negative, you'll turn into a beam of light and vanish with a whoosh.
Gao Zuo: Nani?
System: We'll regularly issue missions for you to lead your academy and its students toward greater heights. Keep leveling up your academy, and you'll have a smooth journey all the way!
Gao Zuo: ...
System: Even though you're invincible, you still need to be careful with everything you do. The consequences of your actions can raise or lower your academy's level. If it goes negative, you'll still disappear.
Gao Zuo: What a scam. This thing's an absolute scam.
System: Don't think you can sit back and relax at a certain level without doing anything. There's a time limit for staying at each level. If you don't level up before the deadline, your level will drop.
Gao Zuo: What an outrageous scam.
System: Good luck! Keep it up, keep it up!
Gao Zuo: !!!
A truly excellent book that doesn't follow any clichés!
The story gets right to the point from the start, the plot moves quickly, and the writing is excellent, especially the scene where the hero saves the damsel in distress and the male and female protagonists (I'm guessing it's the female protagonist) meet—it's very engaging and vividly written. It feels like you're right there in the story. The style is humorous and witty, making it a light and enjoyable read. The system is also written in a fresh and original way. I burst out laughing when I saw the probationary period part. Keep up the good work, author!