Ai sat on the corner of the dark streets, wearing a dark blue hoodie and sweatpants, trying to hide from someone.

Knowing she was safe for now, she sighed in relief, before looking down, as she thought back on what happened few days ago.

After having her children, Aqua and Ruby, she remembered getting stabbed by someone. A man named Ryosuke Kaihara, who happened to be his fan.

"You liar... To think you have a brat... Why... You deceived me..." He said, as he drove a knife into her chest. As she fell onto the ground, bleeding, she remembered her last words.

"I finally said it, this is definitely not a lie, I love you."

Her last words to her children... were telling them that she really loved them.

But then something happened.

With a burst of blue flames and ashes coming out of her body, Ai transformed into something else.

An Orphnoch.

Ai heard about these monsters. Stated to be the "next stage in human evolution", these monsters are created when people died and turned into one. However, they also become driven to kill many humans as possible and take over the world.

That's why the government sent the Kamen Riders, masked warriors who fought monsters like these. Ai had to admit that they were really cool.

As she stood up in her monstrous form, with her children watching scared with Ryosuke, trembling in fear, she thought, "What.... what happened to me....? What... what am I....?"

Ryosuke dropped the knife in fear, as he was about to scream. She looked up, and she unknowingly summoned many tentacles that stabbed him in the chest. Ryosuke then died, bursting into blue flames and disintegrating into ashes.

Staring in shock, she turned to her children. Aqua and Ruby were scared. Ai tried to approach them, but they moved away in fear.

Now knowing she was a monster, she ran.

She didn't know what she was thinking. Abandoning her children? What kind of mother was she? But then again, she just murdered a man, so perhaps it was the best knowing that her children weren't safe from her. Though later on, she was able to turn back into her human form.

As she tried to hide, she was approached by a group of people, calling themselves the Lucky Clover.

They were also Orphnochs who wanted her to join them, as they claim they can make her children Orphnochs like her.

Ai of course, refused, as she did not wanted her children to become monsters. They did not took her rejection so kindly, and tried to have her killed.

After that, she ran, afraid that she will be killed by the same monsters that she became. She couldn't turn to her friends of course. Who would believe her? Not to mention they might try to have her killed for being a monster.

Ai saw the reflection of herself on the puddle of water nearby her. She saw her face morph into her Orphnoch self.

Unable to hold back her tears, she sobbed as she thought of her children and her dreams. Now she had nothing. She couldn't be with her children because of now she is a monster, and scared that what would her children would think of her. A monster.

"I'm a monster.... A scary, horrible monster...." Ai whimpered, curling herself up like a ball. "I'm sorry... Aqua... Ruby..."

After crying for a bit, she wiped her tears, before walking up.

"There you are."

Ai froze. She then slowly turned around, and her eyes widened in shock and fear.

She was found by her chasers.

Kitazaki, Itsuro Takuma, Saeko Kageyama

The other Orphnochs, who wanted her to be part of their group, were chasing her as Ai rejected to abandon her humanity for her children.

"Even though you ran from us, you can't hide that easily~" Kitazaki said, slowly clapping his hand.

Ai trembled, as she remembered the first time she met Kitazaki. He was rather creepy, getting close to her face, touching her hair, and talking to her like if he was a kid playing with a toy.

The three smirked before turning into their Orphnoch forms.

Dragon, Centipede, Lobster Orphnochs

"Come have fun with us, Idol-chan~" Dragon Orphnoch said playfully.

"It is useless to resist, little girl." Lobster Orphnoch said mockingly.

"You can either help us destroy humanity or die." Centipede Orphnoch said with a cold tone.

Ai, afraid, shifted back into her Orphnoch form. She tried to defend herself with her tentacles, but the Dragon Orphnoch deflected them, before the Lobster Orphnoch struck her, sending her flying as she screamed.

She crashed through a nearby wall, as she shifted back into her human form. She cried out in pain, crawling away from her attackers.

The Dragon Orphnoch then approached her. "Ai-chan~ Come on, sing for me~!" He laughed as he approached her.

"No... no... stay away.... please...." Ai begged, as the Dragon Orphnoch continued to laugh as he raised his claw, as Ai whimpered and shut her eyes.

Suddenly, the Orphnoch was shot by a laser, sending him flying away. As Ai turned around, she saw three armored figures.

Kamen Rider Faiz, Kamen Rider Kaixa, Kamen Rider Delta

Ai's eyes widened. "Are those.... Kamen Riders...?!" She muttered in surprise.

"Grr.... Riders!" Lobster Orphnoch growled, as she launched at the Riders.

https://youtu.be/YD1-5mzwgEs

Delta then held up her gun. "Fire!" She said, as the gun announced, "Burst Mode!" Delta then fired many white laser bullets that sent the Orphnoch away.

As the Orphnoch stumbled, Delta brought up the gun again, removing her mission memory and attaching it to the gun which caused it to extend and announced, "Ready!"

Delta then shouted, "Check!" The gun then announced, "Exceed Charge!"

She blasted the laser once more, this time hitting the Lobster Orphnoch, before piercing her stomach.

The Orphnoch screamed in pain, as Delta then jumped, before kicking into the laser.

She then phased through the light, before the Orphnoch exploded while leaving a bluish white triangle-shaped light.

Delta sighed. "I was hoping she stayed alive longer during the treatment, but oh well."

Meanwhile, Kaixa was dealing with the Centipede Orphnoch, as he continued to fight the Centipede Orphnoch. He kept shooting the Orphnoch with his X-shaped gun. He then brought up his mission memory and attached it to the gun, as it announced, "Ready!"

The gun then generated a long blade of light, as it hummed while Kaixa was about to lend a blow, before he flipped his phone and pressed the ENTER button. The phone announced, "Exceed Charge!"

Kaixa then blasted a golden laser which covered the Orphnoch in many x-shaped marks. Kaixa then charged at the Orphnoch, before slashing it.

With a golden x-shaped mark, Kaixa dashed through the Orphnoch, as the Orphnoch shouted in pain before exploding, while leaving a giant golden X.

"All too easy." Kaixa said.

As for Faiz, he seem to be dealing a good blow to the Dragon Orphnoch. The Dragon Orphnoch roared as Faiz continued to block its blows before landing a solid kick.

"I hate working overtime, so let us finish this quickly." Faiz said, as he pulled out his mission memory before attaching it to his pointer on the leg. "Ready!" The pointer announced.

Faiz then flipped his phone and pressed the ENTER button. The phone announced, "Exceed Charge!"

Faiz then jumped, with blasting a red tornado before kicking into the Orphnoch, before phasing through it.

The Dragon Orphnoch staggered. "No way... like hell.... I would lose to you....!!!!" He then screamed as he exploded, leaving behind a red circle with diagonal line on it.

"You never stood a chance from the start. Farewell, Kitazaki-san." Faiz said, as he walked away.

He then joined up with Kaixa and Delta. "I'm assuming the other two has been disposed of?" He asked.

Delta nodded. "You know, even though these are the Lucky Clover, they were surprisingly easy."

"The latest upgrade our Rider system has received must have helped." Kaixa said, as Faiz then turned to Ai, who was watching the fight with awe.

"Ah, right. We forgot about her." Delta said, the three then de-transformed, with Faiz and Kaixa pressing the end call button on their phones while Delta removed the phone/walkie talkie part of her gun and pressing the triangle button.

The three returned to normal with red, gold, and white light dissipating around them.

Kento Nanami "Workaholic DILF"

Kiritsugu Emiya "Unlimited Bullet Works"

Akiko Yosano "Scary Doctor Mommy"

"Uh... umm..." Ai muttered, as she was nervous around them.

Faiz then approached her. "Are you Ai Hoshino?" He asked.

Ai nodded slowly, as he had a neutral expression. Fixing his glasses, he introduced himself, holding up his hand. "My name is Kento Nanami. These are my colleagues, Kiritsugu Emiya and Akiko Yosano."

Ai shook his hand, as he then helped her up.

"Th-thank you." Ai said, as Nanami nodded.

"Well, Ms. Idol, hope you are alright, because you're coming with us." Yosano said, smiling.

Ai looked scared. "Wh-where are you taking me?"

Kiritsugu then lit up his cigarette, before answering. "We're not gonna kill you. Our higher ups decided to have you recruited into our organization."

"Precisely, Mr. Emiya." A voice was heard, as the four turned to see an old man in a suit holding a suitcase walking toward them.

Ichiro Karizaki

The three then bowed, as the old man nodded. Ai stared at the old man.

"It is a pleasure to meet you, Ms. Hoshino. My name is Ichiro Karizaki, and I am the leader of Mythos and in charge of Rider systems' development."

Ai looked surprised. This man was behind Kamen Riders' creation?

"We know the reason behind why you have disappeared from the public, and are aware of your status as an Orphnoch. Which is why we decided to bring you in, so that you can help us, and help you in return." Karizaki said.

"M-me? But... I'm just an idol. I can sing and dance... but what could I do?" Ai asked.

Karizaki chuckled. "Oh, but I assure you, with your new powers, I believe you will be a great help to us." He said, before showing his case. He then opened the case, revealing a black and white belt with a blue smartphone. 

"This is...." Ai said, as she held up her phone.

Karizaki smiled. "It is our newest product in Mythos' Smart Brain Rider System. The Muez Driver."

Ai looked at the blue phone, and then looked at the other three's phones. "Umm... not trying to be rude but, how come mine is a smartphone and yours' are... flip phones?"

"Our gears were developed about 15 years ago. It were initially stuck in development hell after other systems like the BOARD and ZECT. While the phones seem outdated, it still had its use." Nanami said, fixing his glasses.

"As for mine, sweetie, it isn't really a phone though. It's more of a walkie talkie." Yosano said, smiling while holding up her gear.

Suddenly, the wall of the warehouse burst open. The five turned around and saw another Orphnoch.

Lion Orphnoch

As the Orphnoch charged to attack and swung its spear, Karizaki simply blocked it, before kicking away the Orphnoch. He then turned to stunned Ai. "I believe this is your time to shine, Ms. Hoshino."

Ai was flabbergasted. "Wha-what can I do?!"

"Press the M button on the screen. Then dial 6-6-6 and hit enter!" Yosano said.

Holding up her phone, she touched the app with the "M" logo on it, it changed to number dial screen. She dialed, 6-6-6, before hitting the ENTER button. "Standing By!" The phone announced.

As the phone made a looping noise, Ai then remembered how most of the Riders transformed in the TV, which she remember Ruby copying it.

"Henshin!" Ai shouted, before inserting the phone and placing it side.

"Complete!" The belt announced, as blue light came out of it and surrounded Ai, before it engulfed her completely which formed a blue and silver armor.

Kamen Rider Muez

"Woah..." Ai said in awe, looking at her Rider form, as the other three looked impressed.

Seeing the Orphnoch charging again, Muez then threw a punch, which sent the Orphnoch flying.

"Hit the M button again to activate your finisher!" Nanami said, as Muez then hit the same button. "Exceed Charge!" The belt announced, as the blue light flew through her leg.

Muez then ran, charging at the monster before jumping, letting out a shout as she kicked the monster. "Haah!"

The monster was kicked through a blue light, as Muez passed through. The Orphnoch staggered, his body now dissolving in ash, before exploded with blue flames as it disintegrated completely.

As Muez looked at the dead monster, she then hit the end call button, which caused the armor to dematerialize and changed back into her normal form. She looked around in awe.

She then heard Karizaki clapping. "An amazing and excellent debut, Ms. Hoshino. Utterly brilliant." He said.

Ai smiled, as she politely bowed. "Thank you."

Karizaki nodded. "While your Driver is completed, we still need some more testing to ensure it is safe for you to use. Though, I do have another job I could offer you..." Karizaki said.

Ai blinked, as wondering what job she would have from the organization of Riders...

5 Months Later

The job Ai has gotten in Mythos turned out to be a special one like Karizaki said.

After Mythos covered up her "accident and disappearance", and somehow managed to erase her children's memories of seeing their turning into a monster, she also became a poster girl for Mythos: The Smart Lady.

(Imagine its Ai in that outfit. Also, ignore the Smart Brain Logo)

While Ai was surprised, she didn't find it that bad. While her Muez Driver was still on the hold, at least she would try to help others with promoting Mythos.

Not to mention her fans loved it, especially given how the Kamen Riders were popular heroes, and to think that Japan's most famous idol being their poster girl? It was certainly amazing.

As the news reporters and media arrived to take her photo, Ai cheerfully exclaimed, "Welcome to Mythos, Home to Kamen Riders, our brave heroes!"

And just like that, Ai Hoshino regained her paradise.

A/N: And done.

After watching the newest Faiz movie trailer, and seeing Muez, I had an idea that just quickly popped up, on what if Ai Hoshino became Kamen Rider Muez?

Given how Ai dies in the original Oshi no Ko series, and how Faiz is a show with Orphnochs, who are monsters that are resurrected dead humans, I knew it was a good idea and decided to write it, as Ai resurrected as an Orphnoch but later becomes a Kamen Rider like Takumi Inui, the original Faiz, and other Orphnochs like Kiba and Kaido (his actor also happened to play the original Kamen Rider Calibur in Saber).

As for Ai in this story, I plan to put her later on the Trinity Vanguard Rider story, given how this is somewhat of a prequel. She will continue to act as a mascot for Mythos.

As for Faiz, Kaixa, and Delta, the three will all return as well, where they are acting as mentors to BOARD Riders, ZECT Riders, and more.

Welp, that's it for now. Until then... Ciao!