Honkai: Is This Still the Pre-civilization?

He transmigrated to a civilization before Honkai Impact 3rd, but the system arrived 50,000 years earlier. [Mission: Witness Kiana's enrollment at Chiba Academy] "System, I ask you, what year did Kiana enroll?" [Post-Civilization Era 2013] "What time am I in now?" [Pre-Civilization Era 2012] "Then tell me, with a 50,000-year time difference, where am I supposed to find the three starter families to complete the mission?!" [Raiden Mei detected] Looking at Mei, certified by the system as Raiden Mei, Li Mu understood. "True strength never complains about the environment; if the conditions for completing the mission aren't there, they create them." "Kevin, put on this Chiba Academy girls' uniform. From today onwards, you're called Kiana." "What pre-civilization? This is clearly post-civilization!"... Until one day, a certain Earth God, wanting to skip school, came to this era under the pretext of learning history. He saw Schicksal, Anti-Entropy, and World Serpent in a three-way standoff, while the Fire Moth was kicked to the side of the road. The Thirteen Heroes and the Thirteen Herrschers fought side-by-side, frantically beating the Cocoon of the End. There's another 'self' on the moon, inviting me to slurp noodles. "Where did I come from? Is this still a pre-civilization?"