Rebirth: Three Days Before the Black Sun Falls

In his previous life, Luo Feng fought for ten years in the blood sea of ​​corpse mountain, and finally died together with the starry sky beast "Yuan". When he opened his eyes again, he was back in the class of his third year of high school. I thought it was just a ridiculous dream, but a cold mechanical voice suddenly sounded in my mind: [The strongest mission system, successfully bound. Only then did Luo Feng realize that he was really reborn. There are only three days left before the "Black Sun" that devours the entire world and leaves mankind to survive in humble circumstances! When he tried to warn the outside world, a fatal warning instantly exploded in his mind: Warning! Leaking information about the arrival of the Black Sun will trigger the highest confidentiality agreement. Violators will be terminated! Since we can't save the common people, we just want to hold the knife in our hands tightly and protect the only remaining light around us before the abyss comes. But what kind of truth is hidden behind this seemingly desperate countdown? Where did the system come from? Why was he reborn? The ancient ruins deep in the earth and the starry sky, the cold gaze above the starry sky... Was that "black sun" that destroyed everything really just a coincidence?