1. Kara Zor-El dealt with aliens on a daily basis, whether fighting with them as Supergirl or reporting to one in the DEO.

She'd met someone from another dimension once, and traveled to their dimension another time.

But time-traveling aliens from the future?

…eh, not too far out of the ordinary. It was seeing Clark with them- around her age, maybe younger- that was strange.

"How does this even make sense?" she asked someone, once she'd recovered from the trip into what she'd been told was the 31st century. "I just saw him a few months ago, but he's also here? What?"

"Time travel is…kinda difficult to explain. But these people can return me back to my own time at any point, with no time passing in the present day, and no effect to the present since I'm gone for such a short time. I can exist here, now, with you, and also there, at the same time." Clark told her. The others, apparently, had discussed among themselves, and decided she'd need a familiar face to explain things to her.

"Weird, but I guess I'll go with it." Kara said. "So, why did you bring me here?"

"We- the Legion of Super-Heroes- are facing another crisis. And why wouldn't I suggest my favorite cousin to help us out?" Clark asked hypothetically, flashing a goofy smile at her.

"I'm your only cousin, you dork." Kara answered. She punched him in the arm, but she was smiling too.

2. "So…met anyone special here?" Kara asked, as she and Clark walked together, enjoying a rare moment alone.

Clark blushed. "I went on a few dates, with a girl named Alexis…but she wasn't really my type."

Kara raised an eyebrow. "And by not really your type, you mean…"

"She tried to destroy the Legion because she wanted me all to herself."

"Ah." Kara said. "Anyone else? One of your teammates, maybe?"

"Oh gosh, how did you know?" Clark asked, blushing even more. "Who told you?"

"Nobody told me, I was just asking out of curiosity." she said. "Do you want to introduce me to this person, whoever they are?"

"You really want to meet them, don't you?" Clark said.

"Of course!" Kara answered. "If I was dating anyone, I'd want you to know too."

Unless that person had the last name Luthor, she thought. But at this point, it was wishful thinking, and this Clark wouldn't even understand why that name meant anything.

She pushed that thought aside, and followed Clark as he led her to a large room, blue and grey with a towering cylinder of computer monitors in the center. In front of them was a bright orange chair that almost looked like an egg, its back turned to them so neither Kara nor Clark could see who was sitting in it. As the chair turned around, Clark began to speak.

"Brainy, this is my cousin Kara, also known as Supergirl. I got her from the 21st century to help us. Kara, this is my boyfriend, uh…Brainiac 5."

3. "Kal, are you serious?"

She called me Kal, it must be, Clark thought.

"You, and someone from his family? Really?" Kara continued. She looked down at the Coluan, examining him more closely.

"Kal was only a baby when he left Krypton." she told him. "But I was thirteen, and I saw your ancestor take the capital city. I remember how terrified everyone was, realizing that their planet was doomed because of him. How do I know you haven't brainwashed the Legion, especially my cousin, and are secretly using them in a plan to do the same to the Earth, and bottle up New Metropolis just like he did to Kandor?" She loomed over him, glaring down fiercely and trying to intimidate him. He didn't seem fazed, but she still refused to back down.

"First of all, there are far more important planets in this system for me to absorb the knowledge of and destroy than Earth, if I were to take that process, and more important cities on Earth than New Metropolis, so inherently your hypothetical theory is illogical." he told her, matter-of-factly.

"You're not convincing me yet." Kara said.

"And second…" Brainy continued. "I'm nothing like him."

"How so?" Kara asked. She looked over at Clark, clearly upset at her accusal, then back at Brainy. "Besides the obvious, I mean."

"And the fact that he has hair." Clark chimed in, helpfully.

Kara rolled her eyes.

"Besides that, too."

"From the moment I've met him, he's never been anything but a good person." Clark said. "He's tried so hard to fight against his ancestor's legacy, reject everything he stands for. He's a true hero, like me, like all of us. Including you, Kara."

"To say more in front of Clark would affect his timeline." Brainy said. "But you have no place in his memories as of now. There's no such restriction with you."

"What's that supposed to mean?"

"Why don't we talk in private, Kara Zor-El?" he asked her. "I can tell you everything."

Kara looked uneasy, but realized she had to accept his offer, for Clark's sake.

"Alright."

4. "And that's how it happened." Brainy finished.

"I understand now." Kara said, words reflected in the expression on her face and in her tone of voice. "And I'm so sorry."

"Don't be." Brainy said. "Clark reacted the same way, when he found out the truth about me."

"But he came through in the end, and helped you save both your lives. That's amazing."

"Yes, it is." he agreed. But I fell in love with him long before that. he thought.

Then, he remembered something else, that he'd forgotten while he was telling Kara about the development of his and Clark's relationship.

"Kara?"

"Yes?" she asked, momentarily confused.

"Whatever you do, while you're here…please don't ask any of the Legionnaires to show you any of the training simulations I created, especially the ones that exclusively feature myself and Superman." he said. Kara nodded, then smiled.

"Wouldn't think of it." she said, winking at him.

5. "So…that's it, then. A Brainiac and a Super, together." Kara said. "Now I see why you didn't want to tell me."

The two cousins leaned out on the railing of a balcony over the streets of New Metropolis, gazing down at the city.

"Yeah, that was it." Clark said, trying not to blush again.

"It's almost…poetic, in a way. Star-crossed, literally…you know."

"I guess so."

Kara started laughing, then, beginning to realize the parallels of their situations.

"Gosh, we really know how to pick 'em, don't we?" she said.

"What do you mean?"

"No spoilers." she said. "But I really shouldn't have judged in the first place."