Kaito Ga Uninstall: KaitoXReader

It was always about (y/n). About making her happy, being there for her when she was sad, and singing whenever she asked for it. (y/n) was the young, blue Vocaloid’s world. She was kind-hearted, honest, and always gave him a smile that would send his heart beating a mile a minute.

Kaito was part of the Vocaloids, robots that had hearts and feeling and were much like humans. The only difference they held were their voices, they had a slight robotic feel to them, and they had headphones connected to them that would allow them to be connected to the computer for installations and such things. Vocaloids were rare and very difficult to get a hold of, so when Kaito heard of the trouble (y/n) went through, his love for her grew even more. She would always hug him close to her and say things like “I’m so glad you’re here” or “You’re the best Vocaloid ever.” He truly loved his master. And he never wished for her words or smiles be directed to anyone else.

~0~

“Kaito . . . . .” (y/n) called with a hint of sadness in her voice. He came to her room, she was still in bed, not something she usually does on a Saturday.

“Master? What’s wrong?”

She stared at her hands that were folded in front of her.

“Could you . . . .  sing something for me?” she asked, not looking up from her hands.

“Yes Master. But if I may ask, why do you seem so sad?”

(y/n) played with her fingers before answering.

“I think . . . . I’ve been feeling a little lonely. Don’t get me wrong, I’m happy that you’re here, but sometimes, even with you here, this house seems empty,” (y/n) brought her knees up to her chest, “I don’t like it . . . . this lonely feeling . . . .”
Katio looked at her for a minute, then sat on the bed. He closed his eyes and searched his system for a song that he knows will lift (y/n)’s spirits. A computer sound was heard and he opened his eyes and his mouth, and sang to (y/n):

kabosoi higa kokoro no hashini tomoru
itsuno manika moehirogaru netsujou
watashino chou fukisokuni tobimawari
anatano teni rinpun wo tsuketa

karamiau yubi hodoite kuchibiru kara shitaeto
yurusarenai kotonaraba naosara moeagaruno

dakiyosete hoshii tashikamete hoshii
machigai nado naindato omowasete
Kiss wo shite nurikaete hoshii
miwakuno tokini yoishire oborete itaino

sokubaku shite motto hitsuyouto shite
itoshiinara shuuchakuwo misetsukete
"okashii" noga tamaranaku sukini naru
ikeru tokomade ikeba iiyo

mayoikonda kokoro nara kantanni tokete yuku
yasashisa nante kanjiru himanado nai kuraini

kurikaeshitano wa ano yume janakute
magiremo nai genjitsuno watashitachi
furetekara modorenaito shiru sorede iino...
dareyorimo taisetsuna anata

yoakega kuruto fuande naite shimau watashini
"daijoubu" to sasayaita anatamo naite itano?

dakiyosete hoshii tashikamete hoshii
machigai nado naindato omowasete
Kiss wo shite nurikaete hoshii
miwakuno tokini yoishire oboretai

hikiyosete Magnet no youni
tatoe itsuka hanaretemo meguriau
fureteite modorenakute ii
sorede iino dareyorimo taisetsuna anata

(y/n) smiled and blushed as the song ended. She gave Kaito and round of applause. She never knew how much she actually meant to the Vocaloid, she knew the Kaito only sang that cause she downloaded it into his program, but even with that, he still meant every word he sang, whether she knew it or not. (y/n) reached out and pulled Kaito into a hug.

“Thank you Kaito, you make me so very happy.” Kaito wrapped his arms around (y/n), almost protectively.

“You’re welcome Master, I exist to make you happy.”

'But still . . . . this house seems too empty with just the two of us . . . . .'

~0~

Kaito opened his eyes, he removed the cord that connected him to the outlet that allowed him to recharge. He took a look at the clock and saw that he was charging for a good hour.

“Oh man, Master was alone for this long, I really need some kind of new battery so I don’t have to be charged for too long.”

“Kaito!!”

“Huh?”

“Kaito! Come to the living room!” (y/n) sounded really happy, and that made Kaito smile.

'I wonder what’s up?' he wondered as he made his way to the living room. When he entered, he stopped suddenly. There was a new face that he didn’t quite recognize. She had two, extremely long, blue-green pigtails, her eyes matched her hair, and she was about the height of his Master. (y/n) stepped forward.

“Kaito, this is Miku. She’s a Vocaloid like you, took a while to get a hold of her since she’s quite new, but luckily Vocaloids are starting to get popular, so it wasn’t too difficult to get her.”

Miku smiled brightly and extended her hand to Kaito.

“It’s nice to meet you Kaito.”

Kaito just stared at the hand, a blank expression on his face. Miku awkwardly pulled her hand back.

“Ok, hey Miku, could you sing? I wanna make sure everything is working ok,” (y/n) said, sitting on the couch.

“Yes Master.”

Master.

Kaito couldn’t believe it, someone other then him was using that title for (y/n). He grind his teeth together as he watched (y/n) listen to Miku sing. Her gaze was directed to another, and he didn’t like it at all. As soon as Miku stopped singing, (y/n) clapped for her.

“That was wonderful Miku! Seems like everything is working perfectly,” she turned to face Kaito, “what did you think Kaito? Wasn’t it lovely?” Kaito hesitated for a moment, but forced a smile and answered, “It was indeed, Master.” (y/n) smiled big.

“I’m glad you think so, I’m sure we’ll all get along just fine.”

“R-right.”

(y/n) stood up.

“Hey, why don’t we watch a movie together?”

“That sounds like a good idea!” Miku said happily.

“Um . . . . . sure . . .” Kaito mumbled.

During the movie, (y/n) sat in between the two Vocaloids. Kaito couldn’t focus on the movie, his thoughts were on the new Vocaloid and her intrusion. Well, he really couldn’t call it that since (y/n) brought her in, but that would mean he’d have to be angry at (y/n), and that he just couldn’t do at all. The movie took a suspenseful turn, and instead of shrieking and throwing herself at Kaito, (y/n) threw herself at Miku, who also yelped with surprise. The two girls giggled as they held eachother, oblivious to the jealous glint in Kaito’s eyes.

'It shouldn’t matter, I’m Master’s favorite, she’ll soon get tired of Miku and focus on me only. I really shouldn’t worry.'

He could never imagine how wrong he was.

~0~

“That was so beautiful!!” (y/n) cheered, clapping for the two twins who just finished singing a duet together.

“Thank you Master,” they said in unison, taking a bow.

“Duets are always the best!” (y/n) said with a sigh.

“I agree Master,” a burnette said, sitting beside (y/n).

“I wanna try a duet with Kaito, I’m sure our voices will sound just as amazing as Rins and Len’s,” Miku said, sitting on top of the couch.

“Oh that’s a good idea, don’t you think Kaito?”

“Yeah . . . . . right . . . .” Kaito mumbled, standing at the back of the room

Sadly, Kaito was wrong when he thought there was nothing to worry about. (y/n) went out and over time brought in three more Vocaloids. There were a pair of twins named Rin and Len, she adored them and loved their special duets. And there was Meiko, (y/n) liked her happy-go-lucky personality and enjoyed her pitch when she sang.

(y/n) turned around and saw Kaito in his isolated corner.

“Kaito? Is something wrong?” she asked, worried.

“N-no Master . . . . . it’s nothing . . . . .”

She stood up from the couch and walked over to him.

“Are you sure, you’ve been acting a little strange lately. Could it be a virus?”

“Master, really, I’m o-” (y/n) grabbed Kaito’s hand.

“I just wanna make sure, please come with me to check your systems.”

“ . . . . . . Ok . . .”

(y/n) led Kaito to the computer room and hooked him up. Typing for a little while, the screen showed that there was nothing wrong with Kaito’s program.

“Hmmm . . . . . well it says there’s nothing wrong, and no viruses. Hm,” (y/n) disconnected Kaito from her computer, “Kaito, sing something random.” Kaito did as he was told, but his troubled thoughts caused for him to be out of tune, and he messed up a bit during the song. He looked down at the ground in dismay.

“I’m sorry Master.” She merely smiled and stroked his cheek.

“It’s ok Kaito. Because I know YOU can do it.” Kaito felt his cheek becoming warm. He smiled at her and said, “Thank you.” (y/n) tried to see if there was anything that needed to be fixed again, but nothing came up again.

“Ok, seems like there’s nothing wrong.”

“It’s really nothing Master.”

“Well, if you feel like there’s anything wrong, let me know Kaito, I’ll always listen.”

“Ok . . . thank you Master.”

“Heh,” (y/n) gave Kaito a gentle hug, “it’s nothing Kaito.”

~0~

“Kaiiiiiitoooo!!”

Kaito felt someone grab him by his arm. He looked and saw Miku, both her hands around his arm. She looked up to him with concern in her eyes.

“Are you ok? Master has been really worried about you.” Kaito looked to the side.

“I’m fine Miku, really.” Miku was doubtful, but smiled at Kaito and enveloped him in a hug.

“If you ever need to talk about anything, just let me know, I’ll listen.” Kaito knew these words, his Master said them to him not too long ago, but he didn’t feel the same way when Miku said it. He didn’t hug back, but said, “Sure . . . .”

~0~

That night, Kaito paced around in his room while everyone else was sleeping (well, (y/n) was, all the other Vocaloids were in sleep mode). He tried to go into sleep mode himself, but his mind was too troubled for his system to allow it. He looked into the mirror.

“Master . . . . . she doesn’t look at me much anymore, anytime I wanna sing to her, those other Vocaloids want to listen as well, it’s not just Master and I anymore,” he pressed his hand against his reflection, “she now says her kinds words to the others, she smiles at them, and she asks them to sing to her as well.” His hand turned into a fist and he hung his head.

“What should I do?” Then something ticked in his. Something that was unfamiliar.  As a robot, it was called a virus, but to humans, that something has one name to it.

Jealousy.

He looked back up to the mirror, and his eyes widened. They turned from their usual soft blue to a deadly red.

“What is this?” he asked no one. His system began to become corrupt with the virus and a sinister smile appeared on his face.

There was only one way for Master to be only his again.

Uninstall.

~0~

Meiko walked the dark halls of (y/n)’s house, she herself was feeling a bit restless but now was ready for sleep mode. As she entered her room, her door suddenly closed by itself, making her jump a foot into the air.

“Yeek! Oh! Kaito,” she placed a hand over her heart, “you scared the vocals out of me.” Kaito didn’t answer, kept his head down and his hands behind his back.

“Kaito? Are you feeling well? Do you need Master to fix something?”

“Meiko . . . .” She slightly flinched, Kaito’s voice was a bit deeper sounding, maybe there really was some kind of virus in him.

“Y-yes?”

“Can I . . . . have a hug?” This was quite and interesting request from the usual drawn back Kaito, but Meiko smiled softly and embraced him, she blushed when he embraced her back.

“Is this better Kaito?”

“Yes . . . . . What do you think of Master?”

“She’s very kind and sweet, we’re all lucky to have her as our Master.”

“Yes . . . . she is kind . . . . but . . . . .” Meiko felt pain shoot at her back, “she’s my master.” Meiko felt weak and fell to the floor, she looked up and saw a large, blood-stained knife in Kaito’s hands. Her eyes grew from fear. She saw his crimson eyes and shook.

“K . . .  k-ai . .to?” she managed to force out. Even without being able to finish her sentence, saying Kaito’s name that way showed that she was asking “why?”

“Master . . . she was all mine, until you others showed up. I know she brought you here, but I could never be angry with her.” Kaito knelt down by Meiko’s body and raised the knife.

“So with this, I take my Master back from you,” and he plunged it into Meiko’s heart. Her eyes became dull and lifeless, signaling that she’ll never be able to move again. Kaito smiled evilly.

“One down, three to go.”

~0~

The twins fought eachother with pillows after a dispute on what they would sing for Master next time.

“We’re gonna sing ‘Daughter of Evil’ whether you like it or not!” Rin said, chucking a pillow towards Len, who easily caught it and said back, “No! Master likes ‘Servant of Evil’ way more!” He threw the pillow straight for Rin’s face, she managed to dodge it at the right time.

“Ha! You missed!” she taunted. Len’s face became a little shocked when he looked behind Rin.

“K-Kaito?” he asked, his voice shaking a little. The pillow had hit Kaito, located close to hit feet as proof, but that’s not the reason Len was shaking. Kaito held the bloodied knife in his hand for both twins to see, and his narrow eyes were bloody red. Kaito smiled, but it was cold and empty.

“Past your bedtime, isn’t it?” he asked with a joking tone. Rin was too scared to move, so Kaito aimed for her first. The moment he raised the knife, Len bolted forward and grabbed Rin, pulling her away from Kaito and to the far end of the room with him. He held his dear sister close as he said to Kaito, “What the heck Kaito!? What’s going on? Why did you try to attack Rin like that? And why is that knife covered in blood?” Rin trembled in Len’s hold, not knowing what to make of the Vocaloid that she once saw as another brother.

“K-Kaito . . . . Onii-chan . . . . why?” was all she could say.

Kaito approached the twins, knife at the ready.

“Onii-chan?” he asked, a bit disgusted, “so that’s what you thought of me? I don’t need siblings, I only need Master.” Len lunged forward and struggled with Kaito, attempting to get the knife out of his hands.

“Rin! Go get Master! She’ll-” he never got to finish, Kaito sliced his throat, almost decapitating him. Blood splattered all over the walls, floor, and all over the two Vocaloids. Rin went into shock, seeing her twin on the floor, dead. Kaito wasted no time uniting her with her brother. He wiped some blood off his eye when even more blood splattered after killing Rin, now he was a bloody mess, but he knew he was’t finished yet. He left the room, closing the door behind him.

“One more to go.”

~0~

Miku was just about to go into sleep mode when she heard a knock at the door.

“Hm?” She got up form her bed and answered it.

“Yes?” But there was no one there.

“Eh?” She stepped out of her room.

“Hello? Anyone? Rin, Len, if you guys are playing a joke on me, I’ll personally-” An arm slung over her shoulders from behind, scaring her.

“Ah!”

“Hello, Miku.”

“Kaito! Wha-” She stopped herself when she saw that the sleeve of Kaito’s coat was stained with blood.

“K . . . Kaito?”

“I’ve had enough of you the most,” he said coldly, “acting like you were her favorite, forcing me to sing duets with you, taking my Master away from me,” he revealed the knife he had and held it against her throat, “I hated you above all the others.” The words cut Miku deep like the knife Kaito held to her neck.

“K-K-Kaito . . . . please . . . it doesn’t have to be like this. Master loves all of us the same. And . . . . I loved you above everyone else,” she said, a light pink tinted her cheeks as she said her confession. Kaito only scoffed, leaned close to Miku’s ear, and said, “I only love Master and Master alone, there was never room in my heart for someone like you. And,” he slit the knife across Miku’s neck, “I’m the only one Master should love.”

“Kai . . . to . . .” Miku fell to the floor, but she was still holding on. She tried to extend a hand towards Kaito, begging for him to return her feelings. He smirked evilly and got onto his knees, holding the knife above Miku’s heart.

“Goodbye, Miku.”

With that, he removed the last Vocaloid.

~0~

(y/n) slept peacefully in her bed while Kaito uninstalled all the other Vocaloids. He quietly entered her bedroom, her sleeping face bringing a blush onto his face.

'She’s so cute,' he thought as he knelt down by her bed side. He took one of her hands into his blood covered one and laid his head down. The virus in him began to create lyrics of his own song, and he quietly sang out some lines.

"MASUTAA MASUTAA

kono ie ni VOCALOID wa hitotsu desu

boku dake wo mitekure masu yo ne?

MASUTAA

boku dake ga anata no soba ni imasu"

He then rose from his position and hovered over (y/n) sleeping form, singing out the last two lines with all the feelings in his little computer heart.

"Daisuki desu

MASUTAA"

He then places a little, sweet kiss on (y/n)’s lips. She stirred a little before slowly opening her eyes. They went a little wide when she noticed that she was being kissed, and by whom.

“Kaito!?” He backed off and smiled sweetly at her.

“Master . . . . .”

“Eek! You’re covered in blood! I didn’t even know Vocaloids could bleed! Are you hurt!? Should I call the company to-” Kaito stopped her by shaking his head.

“I did what had to be done,” he said. (y/n) flinched at the sound of his voice, it was so much lower pitched then it usually was.

“Kaito, what do you mean by that?” she asked, fearing what he might answer. He knelt before her like a knight would do before his queen.

“There is just one Vocaloid in this house. You will look only at me and me alone, right?”

“Huh? Wait, what happened to the others?”

“They’ve been . . . . uninstalled.”

“You did this!?” (y/n) asked, not believing the lengths Kaito would go just for her. He reached out and took her hand, still kneeling.

“I am the only one by your side now,” he placed a kiss on her hand, making (y/n) go red. She never thought that a Vocaloid would actually fall in love with her, she doesn’t even think such a thing has ever been heard of. That’s when she understood Kaito’s feelings.

“K-Kaito . . . I never thought that you felt that way,” she said, shyly looking to the side. Kaito rose from his kneeling position, leaning in close to (y/n)’s face.

“This voice. This song. Everything. I will give only to you. MY Master. I love you.” He pressed his lips against (y/n) a second time, this time she responded by kissing him back, filling Kaito’s heart with joy.

He finally had his Master all to himself again. And now, she wasn't feeling so lonely, despite what Kaito had done.

Finally, Master is mine again. And it’ll always be this way. If something should happen, I’ll just uninstall the problem.


That’s right.


Uninstall.