Cultivation in Another Realm for All: My Territory Has an Immortal Sect

In the year 234 of the New Era, Li Yi came of age. Like any other person on modern-day Earth, as soon as he reached adulthood, the System possessed him and made him a Host. Then it randomly sent him to the Xianxu Star Domain, where he had to survive empty-handed amid the ruins of various civilizations. Truthfully, Li Yi wanted no part of it. What?! The cat-eared, white-haired nonhuman girl is my senior sister?! I'm in!