Rebirth: in the Beginning, the Maid in Black Stockings Goes to the Wrong Room

Since the first space crack appeared on this blue-white planet, countless alien beasts invaded, and humans have been fighting for more than two thousand years. In his last life, Lin Han suffered from the inability to practice and saw one after another of his compatriots die at the mouths of strange beasts. Unwilling to live a mediocre life, he decided to "abandon literature and embrace martial arts." Cross the abyss and put yourself to death to live. Between life and death. In the end, he actually created his own Kung Fu and embarked on a martial arts journey. It's a pity that Lin Han spent his whole life fighting in a foreign land, but he didn't expect that Lin Han would end up being stabbed in the back by a traitor from the [Sakura Country] who had taken refuge in the alien beasts, together with thousands of aliens! Fortunately, he was unexpectedly reborn and returned to his boyhood. Moreover, he unexpectedly ran into Jiang Chenyu, the aloof school beauty who disappeared that year, in the territory of [Sakura Country]. She was dressed as a maid and walked into the wrong room. Um? Is the school beauty playing with contrast? Or being coerced? Is this the annihilation of humanity or the loss of morality? Forget it, never mind. Since you made the wrong move, then just don't leave!