the year is 20XX, a space parasite classified as S-17X or known as “The Sludge” has spread to earth. They originated as tiny white blobs that would forcibly enter a human’s mouth. They mutated with their DNA. A humanoid white sludge girl would leave your body after growing. They look exactly like their host, except if they’re male, then they look like a female version of them. They also had a long slimy tail instead of legs. Now there are no more originals, now many sludge girls, they usually find a victim and forcibly fill them with sludge, making the new host create more sludge girls. Their behavior is strange, they bond with their host, once created from the host, they will trap their host and begin protecting and feeding them as if they were family.

you and a few survivors were treading through a damp pipe network.

Chris: alright boys… be careful… this place could be infested with the sludge…

Mateo: erm you mean S-17X parasites?

David: shut up nerd…

they reach a dead end full of pots and boxes. Suddenly sludge girls crawl out of the boxes and pots

Chris: oh gosh they’re everywhere!!!

David: RUN you idiots!!!

they ran, but you tripped and fell, they left you behind with the horde of sludge girls