This is an unofficial canon continuation of Maruyama's twitter side story of Momonga meeting Evileye in the era of the 13 heroes.

For people who do not know the prologue, you can either:

1) Go to SkytheWood and read it there,

or 2) read it in Sugar and Spice and All That's Nice posted by SpicyPizza on Fanfiction

Short summary of Maruyama's prologue:

Momonga has transported to New World 200 years prior the main storyline. This time, instead of sitting inside the Throne Hall, he went outside and checked the fireworks finale. He was alone and Nazarick wasn't transported with him. Then he met a [little girl] named "Inberun[aka Evileye]". ~ Sugar and Spice and All That's Nice posted by SpicyPizza

Reintroduction

-XXX-

Her eyes emitted a crimson glow that contrasted her long waist length golden hair. Being showered by the moonlight, her face was truly to be a spectacle to behold. However, Momonga did not have the luxury to admire it.

"Keeno, you said your parents are gone… where…?" asked Momonga.

"M… my…"

Tears started to well in the corner of the girl's eyes.

"Waah…!"

"Wait…! I can help you. I am Sator…"

"Waaah…!"

The crying girl displayed no intent of listening.

Uwah… What do I do? thought Momonga. Being a simple salaryman for the last decade, he had no experience in dealing with children.

He scratched his skull, hoping that an answer would surface to calm her crying.

"… Mo… mother always told… told me… not to talk with strangers… or, or, or get involved wi… with monsters…!"

The girl sniffed her dribbling snot back in and continued crying.

"… Now, now a strange… skeleton man is going to eat me. Waah…!"

Ah! So that's it. But… what do I do…?

The reason was now known but the problem remained. Momonga did not possess many items that can alter one's appearance, especially, into something friendly for children.

Momonga now had the appearance of an adorable pink slime – resembling a soft, squishy, and delectable jelly – with googly eyes. It was a popular choice among the female players because of its looks.

"Waah…!" her crying unexpectedly changed into a shriek of terror. "Monster of legends! I'm going to be dissolved! Help…!"

The faint smell of ammonia wafted through the air.

Horrified of her worst nightmares coming to life, the girl covered her eyes with her hands.

Eh…? Isn't this slime cute? Well, the only thing I have left is…

"[Greater item creation]"

The air was filled with the crackling of electricity and the swirling of purple lights.

The girl felt an odd sensation against her skin. She peeked from between her fingers to see what was going on.

A knight in jet-black metal plates adorned with golden ornaments stepped into her sight.

He gracefully placed the two great swords down.

Approaching the girl, he took a knee – The image of a knight helping his princess.

"W… where are the monsters?" uttered the girl.

Momonga took a deep sigh of relief. The girl settling down meant that he could finally converse with her and begin collecting information soon enough.

"I chased them away."

"I, I won't be eaten…?"

"No."

"And, y… you are…?"

"I am…"

Momonga paused himself to ponder.

Something easy to remember and pronounce for children is best, so…

"… I am Momon."

"Dark Hero Momon! My secret 14th hero!"

Her eyes glittered with admiration.

A star fell, marking this fated meeting.

-XXX-