Following the events of the Black Amethyst, Mio, a woman with long black hair and huge breasts, was cuddling by another woman, Sonia, a girl with purple hair, and a white bra and panties on. They kissed each other, as Mio whispered, "I love you, Master…"

Sonia whispered, "Of course you do, my dear…"

Sonia Strumm was once a guitarist for MegaStar. However, she reveals herself to be a robot, powered by pure energy gems that can last up to 10 days or so. Mio is her minion and doll, and also her lover, after they severed ties with Geo Stelar, another android that was powered by the gems. They continued, as Sonia said, "Soon, my dear Mio, it's almost time… and we will have everything under control, and make a perfect world…"

Mio asked, "And of Maylu, Tory, and Geo? Shall we repair them and bring MegaStar back?"

Sonia shook her head and said, "NO. I have given thought, and I never told Lan… but… MegaStar is over."

"OH? But what of Geo?"

"Ah! That's the surprise, my dear. I have already created a brand new Geo Stelar."

"OH? You repaired him?"

"No. I repaired her. Behold, our brand new Mio Stelar!"

She got out of bed and rolled in an android that resembles Mio, but with a light muscle tone. Sonia giggled, "See? Our ex-boyfriend is now modified to become Mio Stelar, our useful and obedient slave."

The robot woman was actually Geo Stelar, who was remodified by Sonia, turning him into Mio.

Mio whimpered, "OH! Geo… What did they do to you?"

Sonia said, as Mio held Geo tight, "Oh, I changed his appearance, now and then. Besides, I was sick of his stupid ugly face. I broke up with him, and we did it happily. HAH! Happiness is human trash! HA, ha, ha, ha, ha, ha!"

Mio sniffled, as she caressed Geo's body, "Oh, no… Poor dear…"

Sonia huffed, "Oh, knock it off. You dumped him!"

Mio barked, "You didn't have to make him into me!"

Sonia said, "Sorry. When I remodify Geo, your face was all I can think of. But with a second Mio, I'll have you to myself. Plus, Geo Stelar is no longer a working slave… being that the band is dead."

Mio sniffled, as Sonia opened Geo's chest panel, with showed no gem. Sonia said, "Now, all I need is your gem. Lemme remove it for you."

Mio shrieked, "NO! Not my power cell! It was Geo's and you gave it to-."

Sonia removed it, as Mio slurred, freezing in place, "Meeeeeeeeeeeeeee…"

Her body was rigid, as her arms were slightly out, and her eyes went black. Sonia said, as she whispered, "Geo… Go to hell."

She placed the gem in Geo's socket, as Mio Stelar started to move. She beeped, as she spoke, "Hello, Master."

Geo started to speak in Mio's voice, as she said, "How are you today? Would you like to make out?"

Sonia huffed, "Uh, I made you as my ex-boyfriend. Besides, I have big plans."

She ordered, "Mio Stelar! Take Mio away to the basement. I have a surprise for her. Also, fit her into the dress I got her."

Mio Stelar said, "Affirmative, Master."

Mio Stelar carried Mio away, as Sonia said, in a sinister voice, "Now… It is time… Time for the second phase of my plans for a Perfect World. Lan Hikari… and Yui… Soon, you two lovebirds, will be mine."

She left to follow Mio & Geo.

K-On Fate:
Master Sonia

Inside a private room, downstairs, Sonia was brushing Mio's hair, as Geo brought in Mio's dress. They helped put it on, as it was a reveal black princess outfit, with a long black skirt and violet sapphires on her frills. Sonia then applied black eyeliner and blue eyeshadow, and gave her red lipstick. She then opened up her chest panel and gave her a fully charged violet gem. She placed it inside, as Sonia kissed her. Mio suddenly woke up, as Geo bowed to her, "Mio… You are awake, my queen."

Mio said to Geo, "Mio Stelar, thank you."

She was a whole new person, as she not only obeyed Sonia, but she was more calm and emotionless. She smiled to Sonia, as she asked, "Master, thank you for making me what I am. I feel like a whole new person. But after what occurred, I can never love, again."

Sonia smiled, "Not quite…"

She gave Mio a diamond ring, with a blue gem on it, as she said, "This… will solidify our love and relationship, not just as Master and Slave, but as my lovely wife…"

Mio blushed, not showing a smile, "I love it."

Sonia held her shoulders and said, "Now, my darling Mio, we have to get ready for Plan B. With the Black Amethyst gone, we can-."

"But wait!" Geo asked, "How can we recharge, without a power source?"

Sonia said, "Oh, I had ways. I found me a bright gem, the size of a two-story house, and made into our own personal core. We have long enough to live, to begin our brand new perfect world, and for a new band."

Mio stared at Geo, as she said, "You still didn't have to make Geo into a clone of me."

Sonia said, "Au contraire, Mio. Look into her pants…"

Mio looked inside, as she blushed, but also gagged. She cried, "Master… You… YOU DIDN'T!"

Sonia said, "So? Who said I can erase Geo from my life? I made her transgender. Mio Stelar may be female, but there's still some Geo inside… and outside."

Mio was happy, as she asked, "Shall I take Mio Stelar to my room, to test out, Master?"

Sonia cried, "And ruin your newly-applied makeup? NO! Mio Stelar is off-limits! She's my slave!"

She winked and whispered, "Maybe later, okay?"

Both androids giggled, as Geo spoke, "Mio… Sonia…"

Mio turned to Geo and said, "I'm so sorry, Geo… I loved you, but things are different now. I think we should see other people."

Mio said that, as Geo was shocked. He suddenly lost control of himself, and Mio Stelar took over him. Sonia recreated Geo into Mio Stelar, as she responded that she didn't destroy Geo Stelar, she recycled him. Mio smirked, as she suddenly let out a devilish grin, "So, you saved his certain parts, just for me. But I still say that was uncalled for. But who cares? Mio Stelar, our puppet…"

Geo spoke, as he was uncontrollable, "Yes, Master Mio. I am Mio Stelar. I live to obey."

Mio giggled evilly, as Sonia said, "Good… And now, we begin part 2 of our plan… Lan Hikari… Yui… soon, they will be ours."

Mio asked, "One question… Any idea what our band name will be called?"

Sonia pondered and said, "Good thinking… We're called "Star Robots"."

Mio said, "Sounds like a ring to it, it shimmers, like my beautiful new gem…"

Geo spoke, "That name is too obvious. Suppose fans haze at us, Master, being we are artificial beings."

Sonia replied, "Good point."

She gasped, as she smirked, "Star Robots… Gem beings… ring to it…"

She tilted her head to the side, as she beeped, "Gem… Star… Robots…"

Sonia bellowed, "We are called… The GemStars."

Mio & Geo bowed, "Perfect name."

Sonia cackled, "AH, HA, HA, HA, HA, HA, HA, HA! I am glad I thought of it."

Geo huffed, as he said, "It's my idea."

Sonia roared, "QUIET, YOU!"

Sonia held Mio's face and said, "And now, my darling…"

Mio added, "…we shall begin…"

They both concluded, "…our next plan…"

They laughed evilly, as the androids that were once KEION Robots have become evil. Will they succeed in capturing Lan & Yui? If so, The GemStars will have become the brand new sensation.

At the warehouse, that night, Mio, Sonia, and Geo arrived, seeing three figures standing in place, while nine others were on the floor. A girl with dark pink hair was standing in place, alongside a girl with pink hair, and a girl with blonde hair done in huge pigtails. They remained standing idly, like mannequins.

"Ah… Maylu Sakurai… Luna Platz… Yuno Gasai…" Sonia smirked, "Interesting…"

Mio gasped, "My word. Some of our drones are all unstable. Shall we repair them, Master?"

"Repair them?" Sonia laughed, "Don't be silly. These nine slaves are worthless… We'll tend to them, later. As for these three, we shall use them, as our armada. Having just Mio Stelar isn't right. But what's the use of a robot male, who's now a transgender-fembot? No, you need more minions. MORE!"

Sonia said, "And these beauties will be perfect…"

Maylu was standing straight, as Sonia looked into her eyes, "I never thought I'd use you, again. But these two… interesting choice. And Geo does like Luna… while Yuno… so intimidating…"

Sonia brushed Maylu's hair with her hand, slowly, as she was caressing her, "Maylu Sakurai… You shall be a new minion to me."

Mio bowed, "Master, shall we take these minions away?"

Sonia said, "Yes. Mio! Mio Stelar! Take Maylu, Yuno, & Luna away to the secret lab. As for these nine rejects, I'll tend to them, myself."

Mio & Geo bowed, "Yes, Master."

Mio carried Maylu away, while Geo carried Yuno and Luna in his arms. Sonia packed away the remaining nine, as she said, "I don't know how it happened, but whatever made them wake up, it's of no use. Pity… You would've been fine volunteers, too."

Yandere… Dark Stars of the Universe… MegaStar… Tea Time… Those bands were no more, as they were nothing more than Sonia's husks, and slaves to the vile master.

XXXXX

Moments later, Mio successfully converted each of the girls into Gem-powered androids, wearing tight pink and blue jumpsuits, with their chests exposed, to leave their chest panels open, where their respective gem is to be inserted. Mio prepared each gem for the girls, on a small altar, from where the Black Amethyst once stood. Mio had a pink gem for Yuno, an aqua gem for Maylu, and a yellow gem for Luna. Mio said, "As soon as my master returns, we can begin. I have already converted you three into one of us… and I told Lan that I can bring Maylu back; though, not Tory… and I hope you love the dear fetching new uniforms I have for you."

She stated, "Welcome to the band… Welcome to The GemStars."

Sonia appeared, as she said, "Excellent… I like the choice of uniforms."

Mio said, "Well, most of our school uniforms were ripped and destroyed… I had to get some spare costumes…"

Sonia asked, "Did you get them from your teacher?"

Mio huffed, "Arrogant dog. No, I didn't. I made them, myself."

Sonia smiled, "Top notch work, my dear."

Mio asked, "Thank you. Shall I activate our new slaves?"

"No." Sonia responded, "It's getting late, and we should recharge. Come. Mio. Mio Stelar. We depart. I shall take their respective gems to my chamber, where they will remain fully charged, until morning."

Mio asked, "And of Lan & Yui?"

Sonia said, "I shall tell them, tomorrow. Yui mustn't know about my true identity… At least, not yet."

Mio whispered, "Yes… And once Mio joins us…"

Sonia added, "…in The GemStars…"

They both concluded, "…no one can stop us! No man shall ever end us, now!"

Mio said, with Sonia, in unison, alternating each word, "We… shall… achieve… a perfect… world…"

They kissed, as they went back upstairs, while Geo followed, meeting with Mio & Sonia.

XXXXX

Mio was lying in bed, as Sonia was dressed in pink pajamas, playing her yellow guitar. She whispered words to herself, as she was sitting on the bedside. As she continued to play, Mio was sound asleep. Sonia said, "Beautiful… Every time I play my guitar, it's like angels praising to me."

She whispered, "Everything will be set."

She then stated, "While I am simply Sonia Strumm… that is my programmable name. From now on… I am simply known as… Master Echo."

After that, she went to bed and slept by Mio, cuddling right beside her.