The Sect Sister Is so Beautiful, but She Depends on Me to Survive

I traveled to a world of immortal cultivation, joined the sect with the dream of dominating the world of immortality, and became a servant disciple of the Medicine Garden. After I started, the beautiful senior sister took great care of me until my cultivation stagnated. The senior sister said she had prepared a furnace of Huanglong Dan refining materials for me and invited me to refine the elixir together to improve my cultivation. I happily went to the Alchemy Pavilion with my senior sister, looking forward to some beautiful scenes happening in the process. As a result, I'm dead. . . I was refined into a human elixir by my senior sister. When I opened my eyes again, I went back to three days ago and was reborn. Something is wrong, something is wrong with the world. Fake, everything is fake. After rebirth, the world in front of me has changed. From what he could see, the spiritual soil in the garden was actually made up of the corpses of monks, and the roots of the elixir he planted himself were traveling through the garden like bloody tentacles. It wasn't until I awakened from the "Orthodox Immortal Cultivation System" that I realized that the world had been invaded by strangeness, and all the monks were trapped in strangeness without realizing it. Pollution is everywhere. Orthodox cultivation of immortality has disappeared from this world. With the help of the system, the yandere senior sister unexpectedly regained her consciousness, and in the end she had to rely on me to survive. And I, as the only insider of this strange world, embarked on the orthodox journey of cultivating immortality.