Cultivating Immortality in Another World, Starting at Max Level

The chuunibyo teen Luo Tianchen transmigrates from the magical world he lived in. He expected things to go like they do in other novels: he would level up step by step with the help of a System and show off. But the truth is far beyond his expectations. By the time he comes to his senses, he's already nearly max level! And that's not all that surprises him. What is this crybaby System that appears before him in the form of a little girl? Aren't Systems usually supposed to drive the protagonist crazy? Why does it feel like things are the other way around now?

This novel and its characters are entirely fictional. Any resemblance is purely coincidental. Do not imitate.