Project Sekai Oneshot Collection (On Hold + Requests Closed!)

[Request 10] The Name of Sin Rui Ver. (Rui x Mafuyu)

Requested by ssalesbilaazzahra20

Let's say we have that Mafuyu, before her true self abandoned her, in this song fic. I made two versions, since I don't know which you would like, so here you go!
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In the castle above the clouds, Lady Ena, the Goddess of Fate is seen marching around the throne room, impatiently trying to find something fun to do.

"Lady Ena, what makes you seem impatient today?" One of her assistants, Mizuki asked.

"Seem?" She snaps whilst holding lots of printed photographs of herself, "I am inpatient and I wanna do something fun! Taking these pictures of myself is starting to get slightly boring. I want something fun to do!"

"Really? If I remember correctly, there is this kid whose future is quite sad, if I must say. It would be fun to do a little curse on that kid, but that'd be plain rude to them."

Lady Ena's eye widen a little bit, getting an idea, "maybe I can ruin that kid's life even more?"

"E-Ena, are you sure? You might lose your powers, if you do that." The pinkette warns. "Besides, your purpose is to help people discover their fates and all that. They can stand on top of a stage and become an actor or actress, become a Top Star and all that. Besides, what will Otouto-kun think?"

"Well, if I do lose my powers, it'll be on Akito! Now, chop, chop; I wanna ruin that kid's future." She demands.

Mizuki gulps and sighs, "aye, aye, Lady Ena."

They prepare the well as the short brunette begins to do her magic, summoning a reflection of a little boy with lilac purple hair, whose future ahead of him is sad and filled with solitude.

"Mizuki, send me that boy's location." The Goddess' smile becomes grim and scary.

Meanwhile, in the Kamishiro Household, a little boy with purple hair is creating machines, that should be able to innovate the future.

"Little boy, come out of your home." The boy hears the Goddess' voice.

Man, the little boy was tempted to go outside. Lucky for him, his parents were asleep, so he exits his room using a rope. He searches outside his house, trying to find the one calling out to him.

"Hello, little boy." Lady Ena greets with a fake smile plastered on her face.

"Oh, hello, Ms, uh."

"Shinonome." She reminds. "What's your name, cutie?"

The little boy introduces himself, "I'm Kamishiro Rui."

"So, why are you calling me?" The boy, Rui asks.

Lady Ena fixates her eyes on young Rui. "You're such a lovely child! A boy like you deserves a gift."

Rui's eyes sparkle with hope and excitement, "really?"

"I mean, of course, the special sort. I guess I'll leave you with a little magic." Thus, she waves her finger into the air, casting some magic.

As Rui got older, he noticed he's starting to look pale and his body withering. His eyes later became recessed, just like his frame. His parents blamed it on inventing robots and other mechanical things, not caring for his body and eating his veggies, so they confiscated them. When it got worse, they abandoned him.

One day, Rui was out, going to buy some more things to create robots with. A group of kids were playing and saw him. Legend says if someone sees Rui's figure, they'd yell for help or call him names.