It Turns Out That the Biggest Danger Is the People Around Me

The villain is the system. The female protagonist comes from time travel, and the male protagonist's predecessor is the melon-eating system and is put into the world of immortality by the main system. The male and female protagonists join the same sect. The female protagonist is parasitized by a parasite from the negative plane. The purpose of the parasite is to devour the female protagonist's power and then offer it to the reset plane master system. However, the world of immortality is originally a huge conspiracy of the system bureau, and the male and female protagonists are the protagonists in the conspiracy. The two grow together, become stronger together, and resist this huge conspiracy together.