While this is a Supergirl chapter, it will be mostly about Kara and her vacation on Earth-1. Sam's subplot from Supergirl 3x07 will be included here, but with one little change. Enjoy.

Leave a review after reading, please. Feedback is always appreciated.

I'd like to thank the following users for reviewing the previous chapter: Ladyawesome45321, CallMeMiles, TheLifeStruggleIsREAL, Aragorn II Elessar, Guest

To Jason Hunter: About Oliver made-up story about capturing Laurel, I'm working on it. As for making Supergirl the third Worldkiller, I don't think it's a good idea. While it sounds cool on paper and makes her story darker, it'll be too much to handle. Sorry, but I can't make it happen.

To Guest: I know Oliver and E-2 Laurel falling in love is a very bold choice with many factors that make it impossible to happen. Yet, why do you think I keep bringing up Injustice 2? It's not just for humor, that's one thing. Maybe making E-2 Laurel's history that same as E-1 Laurel's takes away her individuality, but need I remind you that she killed E-1 Quentin in this story? Look, I'm trying to make this work. Besides, it's just beginning. I'll be adding more layers to this love story to make it a bit more convincing. Who says you can't replicated Injustice 2's inter-dimensional love story between Green Arrow and Black Canary?

"That feels like an oversimplification." - Barry Allen, Justice League

It has been a rough week for Barry. After Iris had broken off their engagement, he has been sulking 24/7. Oddly enough, he didn't ask for another one of Caitlin's concoctions that would allow him to get drunk (only because Cisco hadn't told him that he tampered with the first drink). He was just doing what he usually does. Run around the city as The Flash, saving civilians, and trying to smile for the cameras.

Kara had been doing the same since she showed up. When Barry cancelled karaoke night, she decided to dress up as Supergirl and do some heroics. She and The Flash partnered up for some fights, and the media is already calling them "World's Finest Duo." They liked it.

After saving people from a burning building, the super duo were approached by reporters.

"Supergirl, how does it feel to be working with The Flash?" One reporter asked.

"Best thing that ever happened in my life," Supergirl said, smiling at Flash.

"Where have you been this past year?" Another reporter asked. "You disappeared after the alien invasion."

"All I can say is that I have a life outside of this cape," Supergirl answered, trying not to give too much away.

"Flash, are you and Supergirl dating?" A teenage girl asked, recording the interview.

"Wha... oh... uh... no. No, we're not," Flash said, surprised by the question. "She and I are just friends."

"Super friends," Supergirl added, nudging Flash on the shoulder.

"Where's Kid Flash?" asked a reporter.

"Taking a vacation. He went through some hard times, and he needed space," Flash answered.

"Is he ever coming back?" The teenage girl asked.

"One day, I hope," said Flash.

"Who do you prefer to fight with? Kid Flash or Supergirl?" The teenage girl asked.

"Whoa, you can't make me choose between my friends. They both mean so much to me," said Flash.

"Aw, Flash. I'm hurt," Supergirl joked. "What can I do to be on top of your list?"

"I don't have a list," said Flash.

"If you want, I can take you out for karaoke. Supergirl and Flash singing on stage. Now, wouldn't that be fun?" Supergirl suggested.

"Maybe another time," Flash said awkwardly. "Now, as much as we would love to answer more questions, we better get going."

"Wait, Flash!" The teenager girl called. "Can you sign my phone?"

The teenage girl gives Flash a marker. Good thing The Flash practices writing his own signature just in case anyone asks for an autograph. He signs his autograph on the back of the girl's phone.

"Anyone want my autograph?" Supergirl asked.

One reporter gives Supergirl his notepad and says, "It's for my daughter."

Flash and Supergirl head back to S.T.A.R. Labs for a quick break. As soon as the two entered the elevator, Flash decided to talk to her about something that happened back at the interview.

"So, why did you have to bring up karaoke night?" Flash asked.

"Sorry. I didn't mean for it to happen like that," Supergirl apologized. "I guess I'm still ticked. I mean, I know you need time to recover from the breakup, but..."

"I know. You came here to ask for my help in finding some levity in your life, but now I'm the one wallowing in the dark," said Flash. "I'm sorry."

"Don't be. I understand," Supergirl said.

"Let's do it tonight," said Flash.

"But you're still not completely okay," said Supergirl.

"No, but maybe this night'll help," said Flash.

"Okay. Tonight, it is," Supergirl agreed. "Should I go formal or casual?"

"Well, we're not going on a date, so casual will do," said Flash.

"Linda told me that Caitlin went to a karaoke bar with you in a sick dress," said Supergirl.

"She did look really nice in that dress," Flash said, remembering that night.

"Wanna bet I can top it?" Supergirl dared.

"You just really want to wear a dress, don't you?" Flash guessed.

"Well, I want to see what taste of fashion Earth-1 has," said Supergirl.

"I'm pretty sure it's just the same as on your Earth," said Flash.

The two arrive at the cortex, where Iris, Cisco, and Caitlin were to congratulate them on saving the people from the burning building. Iris, however, resorts to a friendly punch on the shoulder as she is still uncomfortable being in the same room with her ex-fiance. Joe was there as well, expressing how proud he is that the two are protecting Central City.

"You two are gonna put a cop like me out of a job," Joe said, still feeling proud for the two of them.

Barry remembered Joe saying something similar in a dream that he had.

"If you want, I can try for a job at the CCPN. Then I can take days off from superhero-ing," Supergirl said jokingly.

"Maybe you should," Flash suggested. "I mean, you can't just be Supergirl all the time."

"Trust me, Barry. It's for my own good I stay away from my human life," said Supergirl.

The way Supergirl said "human" made Flash feel worried and confused. He is definitely going to ask her about this tonight, even if might ruin their night. He's just curious, that's all.

"But I am taking the night off," said Supergirl.

"Why?" Cisco asked. "Are we going for a night out of town or something?"

"Actually, just me and Barry," said Supergirl.

"Ah, karaoke night," Caitlin guessed, having remembered that Iris mentioned this during the bachelorette party.

"You wanna come?" Supergirl asked the ice-powered meta. "Barry says you're an amazing singer."

"Okay, that is a lie," said Caitlin. "And no. You two go on and have fun. Don't need me to ruin your night."

Earth-38

Samantha has been troubled all day because of one reason: she might have super powers. During the unveiling of Supergirl's statue, she lifted a very heavy column off Ruby without any help. When someone tried to shoot Lena during her public announcement about stepping down as CEO of L-Corp, Sam was shot, but the bullet was flattened when it made contact with her body. She then puts her hand in a boiling pot of water, and she felt nothing.

So, she went to her adoptive mother's house for answers. She found out that she's an alien. Her pod was kept hidden in the shed. She found a crystal that would take her to where she needs to go to get the answers she seeks.

This meant that she would have to leave Ruby for a while.

"Alright, Rubs, Ms. Qualar is coming to stay," Sam said.

"For how long?" asked Ruby.

"I'm not sure yet, but I do know you hate her cooking, so I'm leaving money for takeout," Sam said, giving Ruby a check.

"Where are you going?" asked Ruby.

"I'm not exactly sure yet," said Sam. Seeing how scared Ruby is, she says, "You don't have to worry, okay? Nothing is wrong."

Sam and Ruby sit on the couch as Sam continues to explain what is happening.

"I found something out about myself, and it's a really good thing. It's gonna answer a lot of questions, but I gotta take this trip to get those questions answered," said Sam.

"Can't I come with you?" Ruby asked. "I can come with you..."

"I know you would, and I wish you could, but I gotta do this on my own, okay?" Sam said. She holds her hand out and says, "Hold my hand."

Ruby did.

"Do you feel that?" Sam asked.

"Your pulse," Ruby answered bluntly.

"That's you. You are my heart," said Sam. "Are you gonna trust me? Something wonderful is happening."

"Just promise to tell me all about it when you get back," Ruby asked.

"I promise," Sam said, kissing her daughter on the cheek. "I love you so much."

Ruby hugs her mom and says, "I love you, too."

Earth-1

Barry was at Kara's apartment building, where he agreed to pick her up at for karaoke night. When Kara first came, Barry offered Joe's house for her to stay, but she insisted on living on her own, just in case she may need space. Barry had been waiting outside her door for fifteen minutes. He just hummed "Summer Lovin'" as he waited.

"Okay, I'm ready," Kara said.

The door opens, allowing Barry to see Kara's new dress. Bright red with golden glitters. Needless to say, Barry was wowed.

"Well, what do you think?" asked Kara.

"You look... amazing," Barry said honestly, all with a smile on his face.

"Thank you," Kara said, smiling and blushing a little. "So, shall we?"

Barry and Kara arrive at the same karaoke bar where Shawna Baez and her ex-boyfriend used to hang out, the same bar where Barry and Caitlin sang together. They showed up just in time to hear a drunken couple sing terribly together on stage. The two can't help but cringe. They sit down as they waited for their moment.

"Sometimes I wonder why people get drunk to sing here," said Kara.

"Well, it entertains the people in a different kind of way," said Barry.

"I'm sure you made everyone's ears happy that one night," said Kara.

"Linda said I was the best singer she's ever heard," Barry mentioned.

"Well, she's not wrong," said Kara.

"So, um, how are you feeling?" Barry asked.

"Barry, we came here to have a good night, not to talk about feelings," said Kara.

"I know. It's just... I wanted to be sure you're doing all right here," said Barry.

"Being here with you and your friends, I'm doing okay so far," said Kara. "Alex may hate me for saying this, but I miss home a lot less."

"I'm glad to hear that," said Barry.

The drunken couple on stage were finished, which meant it was time for Barry and Kara to steal the show. They selected their song as they stepped on to the stage, preparing to wow the crowd with their voices. Their previous singing experiences have given them more confident about their singing talents.

Barry

Don't go breaking my heart

Kara

I couldn't if I tried

Barry

Oh, honey if I get restless

Kara

Baby, you're not that kind

Barry

Don't go breaking my heart

Kara

You take the wind out of me

Barry

Oh, honey when you knocked on my door

Kara

Ooh, I gave you my key

Barry & Kara

Woohoo
Nobody knows it

Barry

When I was down

Kara

I was your clown

Barry & Kara

Woohoo
Nobody knows it
Nobody know-whoa

Barry

Right from the start

Kara

I gave you my heart
Whoa, whoa
I gave you my heart

Barry

So don't go breaking my heart

Kara

I won't go breaking your heart

Barry & Kara

Don't go breaking my heart

The people in the bar were loving it. They were the two best voices they've heard in a long time. As they sang, the crowd cheered. Once the song was over, they cheered even louder.

"That was fun," Kara said.

"No kidding," said Barry. "I really like singing with you."

Kara blushed again and said, "And me with you. Too."

Kara reaches into her bag and pulls out a bottle of Aldebaran rum.

"You brought your own drink?" Barry asked.

"It's an alcoholic drink made specifically for aliens," said Kara. "It's the only way I can get drunk. What about you? Did you bring any more of that stuff Caitlin made?"

"Uh, no. No, I didn't. I would really prefer not to get drunk again. It wasn't as great as I thought it would be," said Barry.

"Well, then be ready," said Kara.

Kara pours her alien rum into her glass and fills it all the way to the top. Kara started drinking it as fast as she can. After she was finished, she winces from the bitterness. When her eyes made contact with Barry, she looked like she was trying to hold back her laughter.

"Are you okay?" Barry asked, smiling awkwardly.

Kara started giggling, which then turned to full-blown laughter. Barry can only laugh along a little bit, slightly amused by how quick the effects of the alien rum are.

"That was fast," Barry commented.

"Fast. Ha! You're flunny," Kara babbled, slurring her words. "And cute."

"Uh... thanks," Barry said, flattered and confused.

"Hey, do you wanna swing another stong?" Kara babbled, still slurring her words.

"Uh, not really," said Barry. "You're, um, uh, slurring your words there."

"Am I?" Kara asked. "Chor-co-lat. Stra-a-blurry. Ve-ve-nillo."

Barry had to cover his mouth to hide his laugh. And he thought he was hilarious himself when he's drunk. Drunk Kara was downright hysterical to see.

"Well, do you want a chocolate-strawberry-vanilla ice cream?" Barry asked.

"Oh, Rao. Yes," Kara said, practically begging for one. "Let's go. Let's go. Move it. Aren't you supposed to be the fastest man..."

Before Kara could finish that sentence, Barry grabs Kara and super-speeds out of the bar and on to the street.

"Alive?" Kara finished. "Why do I feel like I'm gonna throw up?"

"Alcohol and super speed. I forgot. Not a good combination," said Barry, remembering what happened to Caitlin.

Kara throws up on the sidewalk. Barry pats her in the back as an act of comfort.

"You sure you still want that ice cream?" Barry asked.

"Yezzz! I want it bad!" Kara babbled, grabbing Barry by the collar.

"O-Okay," Barry said, feeling a little scared of Kara.

Barry and Kara returned to Kara's apartment building. Kara was still eating her Neapolitan ice cream cone. She was really enjoying it, Barry could tell. She was licking it faster than any normal human being should even lick ice cream. Thankfully, Kara is Kryptonian, so brain freeze wasn't gonna be an issue. She was, however, still drink.

"You want to try some, Barry?" Kara offered.

"No, thank you," said Barry. "Let's just get you in bed so you can sleep this off."

"I'm fine," said Kara.

Kara would be proven wrong when she almost fell down. Luckily, Barry was there to help keep her standing up. They enter her apartment, which was pretty small. Still, it had everything Kara needed. A kitchen. A couch. A TV. A bed.

"You sure you still don't want to move in with Joe?" Barry asked.

"And ruin his love story with Cecile, no way," Kara said.

Barry and Kara sit down on the couch. Kara had just finished all of her ice cream. She proceeded to eat the cone anyway.

"So, um, you wanna talk now?" Barry asked.

Knowing Barry wants to talk about feelings, Kara grabs a glass and pours herself another drink.

"What else is there for me to say? I'm a murderer," Kara babbled.

A shocked Barry takes the glass away from Kara before she could drink more.

"Wait, what do you mean?" Barry asked.

"Mars. A staff thingy. Evil white martians. I killed them all. Pyew! Pyew! Pyew! Pyew! Dead," Kara babbled with a deadpan tone.

Kara takes her drink back from Barry and downs every single drop.

"Kara, I'm sorry. I can't imagine how hard it must be for you," said Barry.

"That's the thing. It wasn't hard. I just smiled it off, like some sick twisted psychopath," Kara continued, still bubbly from the drinking. She then started laughing for no reason.

"Is that why you're really here? Because you don't want anyone at home to see you as a killer?" Barry asked.

"No, I came here to see you. Only you," Kara confessed. All that drinking had turned her into a truth bomb. "I'm losing it, Barry. I lost Mon-El. I lost everything. I'm losing myself. I just needed to come here and see you because you're my only source of sunlight right now."

Kara was about to cry, so Barry puts one arm around her and holds her close.

"There, there. It's okay," he said gently. "Look, Kara. I know you. You wouldn't just kill just because you think it's the best option. So, why did you do it?"

"It was self-defense. Them-or-me kind of thing. But it didn't stop there," said Kara. "I tried to kill some evil businessman. He's alive, but not unscathed. Threw him across the room like a rag doll. I mean... isn't that funny? No! No, it's not. What is wrong with me?"

"Loss can take a heavy toll on you. I know, because I've been where you are," said Barry. "Reverse Flash killed my mom. Zoom killed my dad. Savitar tried to kill Iris. I wanted nothing more than to kill them."

"But you didn't," said Kara. "You chose to do the right thing, and spared their lives. You're a real hero, Barry. I'm not."

"Hey, don't say that," said Barry. "You're more of a hero than you think."

"You really think so?" Kara asked.

"Look, Kara. I know that losing so much can do things to you. For all we know, I could've been like Zoom. Ruthless, uncaring, and crazy. But I'm not. Zoom and I may share the same tragic background, but I have the one thing he never had," said Barry.

"What is it?" Kara asked.

"A family," Barry answered. "And that is why you could never be a killer, Kara. You have so many people in your lives to keep you grounded. From what you told me about your family on your Earth, I can tell they love you so much. If not, you wouldn't be the caring, wonderful Girl of Steel I know you are."

Kara smiled.

"And you have a family here as well. Cisco. Caitlin. Joe. Iris. Harry. Me," said Barry. "You can count of me, as you can count on all of us. You're my family too. I will always be there for you, no matter what, no matter how dark the times are."

Kara's smile grew wider and she leaned closer. Before Barry knew it, Kara's lips made contact with his. Confused and a bit scared, Barry wanted to lean away, but Kara was relentless and followed him as he leaned back. Barry then falls on his back, which ends the kiss.

"Wait... what did I just do?" Kara asked, seeming confused.

"Well, uh, you just um..." Barry pointed at his own lips, unable to say the K word to her.

"Oh, what is wrong with me? Why am I such an idiot?" Kara complained, smacking herself in the head.

"Hey, you're anything but," said Barry.

"No, I am an idiot," said Kara. "I mean, you just got off a breakup with the love of your life. What am I doing kissing you? I am such a moron."

"Come here," Barry said tenderly.

Barry once again puts an arm around Kara and pulls her close for a comforting hug.

"How long?" Barry asked.

"Probably since we met," Kara answered.

"You mean while you were still in love with James Olsen?" Barry asked.

"Like I said, I'm an idiot," said Kara. "I didn't want it happen this way. I'm just a stupid drunk blonde."

"It's okay," said Barry. "You're in a lot of pain, and you need a shoulder to lean on. I'm more than honored to offer mine, as long as it keeps you happy. I just hope that..."

Barry stops when he heard snoring. Kara had passed out and fallen asleep on his shoulder. Barry can do nothing more but smile and give her a little kiss on the forehead.

"Goodnight, Kara," Barry said.

Earth-38

Meanwhile, Sam was still following the crystal to where she needs to go. It lead her to some desert far away from National City. Her car soon breaks down, which means she has to travel on foot. The crystal glows brighter and brighter as she walks, meaning she is getting closer. When she arrived to where she was supposed to be, the ground started to shake, causing her to lose balance. Something came from below.

Out of the sand came sharp rock pillars that formed some kind of fortress. Once it was finished building, Sam went inside.

Inside, Sam found a symbol that resembled Supergirl's. Only, instead of an S, there was skull-shaped figure. Sam found a console where she believes the crystal has to be placed on. Once the crystal was in place, a hologram of a woman in a black cloak appeared. Sam recognized her. She's seen her in her dreams.

"Who are you?" Sam asked.

"Science. Magic. Information. Your friend," said the holographic A.I.

"What is this place?" asked Sam.

"This is your Fortress of Sanctuary," the holographic A.I. answered. "A piece of your world. The dead planet Krypton."

"Ruby was right," Sam realized. "She thought I had powers and I do. I'm like Supergirl."

"You are so much more than that," said the holographic A.I.

"Who am I?" Sam asked.

"You are a culmination of centuries of work. A being designed for one purpose. To execute justice," said the holographic A.I.

"I'm a hero?" asked Sam.

"They will not call you a hero. They will call you Worldkiller," said the holographic A.I. "They will try to contain your power, but they will fail. You will show no mercy to those who oppose you. Your justice will burn the world of man."

"No, I'm not a Worldkiller," Sam said, denying what she has been told. "I have a life. I'm a mother. I have a daughter."

"Your offspring was an unfortunate error," said the holographic A.I. "She delayed the realization of your destiny."

"She is not an error," Sam insisted.

"It is time for you to emerge," said the holographic A.I. "It is time for you to become Reign."

Suddenly, Sam felt something inside of her. So much power. It was painful. Her body burned up and her head hurt worse than a migraine. She dropped to her knees as she screamed in pain. When the screaming stopped, she breathed calmly. She stands up and opens her eyes. Her eyes glowed red.

"I have awaken," Sam said in Kryptonian.

"Good," said the holographic A.I. She then sensed something. "We are not alone, I'm afraid."

Sam turns around and sees someone. This mysterious someone was slow-clapping, as if proud to see that her transformation has become complete.

"It is nice to finally meet you, Samantha. Or do you prefer... Reign."

Take a guess who came to see Sam. I'm sure you already know. Maybe not, maybe you do. Let me know what you think, if you wish.

For the next chapter, we're heading back to the "Flash" storyline, although this chapter is technically half-Flash, half-Supergirl. Legends of Tomorrow will be back in the third part of the next four chapters.

"Don't Go Breaking My Heart" by Elton John & Kiki Dee