AN: This fic is set on June 9, 2013.

"Whew! Made it!" the girl said, wiping the sweat off her brow.

"From where?" Phineas inquired.

"Twenty-eight years into your future."

"This is great!" Baljeet exclaimed. "We did not have to go to the future - the future came to us!"

The girl cocked a crimson eyebrow.

"Best start the introductions," Phineas said. "I'm Phineas and that's my stepbrother Ferb."

"Greetings," the green-haired Brit said to the girl.

"That's Baljeet," Phineas continued, pointing to the scrawny Indian boy, who was presently getting a noogie from a much larger teen, "and that's Buford."

"Let me guess, Buford's a bully," the mysterious girl said.

"Well, it's my opinion that Buford's only doing that out of boredom. Especially now, when there's no school. So by inviting him over to help build our inventions, we can take his mind off bullying for a little bit."

"Ah, yes, the preoccupation technique. Now where have I seen that before?" the girl replied.

"So...who are you?"

"The name is Flynn," the girl said, taking Phineas' hand and shaking it. "Susanna Flynn."

"Hey Phineas!" Buford said. He was done giving Baljeet a noogie now. "She has the same last name as you. Isn't that a weird coincidence?"

"Not really, Buford," Susanna said. "After all...Phineas is my father."

Everyone gasped.

"You're...my daughter?" Phineas asked. "Does that have anything to do with why you came here?"

"It has everything to do with it," Susanna replied. "You see, on this day twenty-eight years from now, I learned there was an invention you couldn't finish. That one," she said, gesturing to Cupidtron. "So, after gathering up the necessary parts, I travelled back in time from 2041 to help you out."

"Wow."

"I know."

"Wait," Baljeet interjected. "You cannot possibly have the parts we need. They would not fit in your pockets!"

Susanna laughed. "Baljeet, you have no idea about what my time is like - and what yours will be like. For I have a little something Dad invented called...the Packet of Infinite Space." And with that she pulled out a small, ordinary-looking paper packet. She shook it once, and a pile of objects far bigger than the packet itself fell out of it.

She walked over to the hulking device in the yard, got on her knees, took off a panel located on the bottom of Cupidtron's front, and rapidly began placing the parts into the machine. (A sped-up version of the song that plays when the guys work plays). Finished, Susanna put the panel back in place, stood up, and triumphantly walked over to the guys, and said, "Try it now."

Ferb went up to the machine and pressed the power button. This time, the machine hummed awake, and the screen turned a lighter shade of green. A picture of a yellow book labeled CUPIDTRON FOR DUMMIES showed up on the screen.

"For further information, please consult the instruction manual," the machine bleeped, in the same voice of the supercomputer from the episode "Ask a Foolish Question". The picture of the book disappeared and was replaced by a model of DNA.

"To start, simply place any piece of your DNA on the scanner," the machine explained. "It will check for minute amounts of oxytocin. [The screen then showed a model of the molecule.] This hormone is responsible for romantic and familial bonds. [The screen changed and showed a simplified diagram of its internal mechanisms.] An internal probability generator, various other internal mechanisms, and data from June 1st, 2041 will work together to determine the identity of your true love based on the received information. [The image changed to show a man and a woman.] If you scan your true love's DNA as well, you activate the descent function, which will show your descendants as of June 1st, 2041 if you have any. If your true love is not present or you do not wish to see your descendants, please press the reset button [referring to a green button on its control panel marked "Reset"] to scan in another person. The descent function will automatically reset the machine." The explanation stopped, and now showed a split-screen with slots for people's data.

"And now you know the basics of its function," Susanna said. "You probably already did, but..."

"Susanna, if you're really Phineas' kid, prove it," Buford said.

"Gladly. I have the evidence in my POIS," she replied. She pulled out the packet and stuck her right hand into it. "Let's see...there's Atlantis...and another undiscovered continent...Ooh! A rogue planet!" After rummaging around further, she found what she was looking for and said, "Here you go." She pulled out a photograph, handing it to Buford.

The photo depicted an older Phineas and a younger Susanna. A time stamp at the bottom read 10-7-2035, meaning Susanna was around six when the photo was taken. Standing next to Phineas was a beautiful raven-haired woman.

"Okay, I'll buy it," Buford said. He handed the photo back to the girl, who passed it around the rest of the guys. Phineas got the photo last, and on seeing it immediately felt like he had to ask his daughter a question.

"Hey, who's that?" Phineas asked, pointing to the woman.

"Oh, her? That's Mom," Susanna explained. Phineas handed her the photo, and as she gingerly placed the photo back into the POIS, Phineas thought, Could it be? Could it be that the girl of my dreams will marry me in the future?

"Well, Cupidtron is finished," Baljeet announced, snapping Phineas out of his trance. "Now all we need is a test subject. Would Candace work for you, Phineas?"

"She'd be perfect," Phineas replied. "Speaking of which, where is Candace?"

"I think she's inside with Isabella," Buford said.

"Thanks. I'll get them so they can see how cool Cupidtron is," Phineas said. "And Susanna? You're just going to love Isabella. She's my best friend. Wait here."

As Phineas rushed inside, Susanna noticed something was off. And considering her phenomenal brainpower, that was quite easy to do.

"Uh...guys? Is there something going on? Because I think there might be," she asked, turning to the remaining boys.

"Isabella really likes Phineas," Ferb explained. "Phineas doesn't know she has a crush on him yet, but we've been trying to get him to ask her out for a while."

"Phinny doesn't know, so don't tell him," Buford added.

"Don't worry, I won't. I just wanted to know if the feeling I had was suspicion and not something I ate." Susanna belched. "Sorry. Last night was taco night."

"It's okay," Buford said.

"For you, maybe!" Baljeet exclaimed.