Gaster x Child!Reader. The reader as a child is only seven years old. They fell down in the Underground and Gaster had to take care of them and he raised them. They got along with him, Sans and Papyrus. He ended up treating the reader as his own child. The reader ended up calling him 'dad'. Six years later, the reader had lost their 'dad', then they returned to the surface.

The story is about a Norwegian metalhead girl, Claudia Sørensen, who had a hard life. She got left by her ex, Åsmund Hagen. She actually saw the Slenderman when she was younger but she didn't know it was him. Later on, she will become a Slenderwoman, and she will also do a revenge. She will discover who is Slenderman as well..