Another Day as an NPC in a Horror Game

[Nonhuman protagonist + infinite flow + horror and the supernatural + NPC] After waking up with no memory, she had not only become a weak little slime, but had somehow ended up as an employee at a strange hospital. She was told she had to travel between different small worlds every day, play a terrifying NPC, and earn points to stay alive. To survive, Miss Slime lived in constant fear, spending year after year rushing between countless small worlds. But during one mission, a System named Mr. A suddenly appeared in her mind. They had not been together long when, during a mission, he claimed to know all about Miss Slime’s past. But that past was too painful, he said. She had to uncover it for herself. Seeing this, Miss Slime patted her head and worked even harder, running around the small worlds. But when she returned after completing her seven-thousandth acting mission, disaster struck: countless followers burst through the hospital gates and hailed her as a god. At the same time, Miss Slime’s long-buried past was slowly beginning to unfold.