There was a soft ping against Isabella's window.

She groaned.

Another one. And then a third.

Isabella Garcia-Shapiro cracked one eye open and glared at the alarm clock. 12:07 AM. She had been dreaming about napping on a cloud. It had been a really good nap.

She shuffled to her bedroom window and yanked the curtains aside.

Down below in her front yard stood Phineas Flynn, flashlight in hand, his signature spiky red hair slightly tousled, and a lopsided grin on his face. He waved up at her.

"Phineas?" she called, half-whisper, half-grumble. "Do you know what time it is?!"

"Technically, yes," he said. "And it's the perfect time to take you somewhere."

"Unless 'somewhere' is back to sleep, I'm not interested."

"C'mon," he grinned. "Trust me."

And despite her utter exhaustion, despite wearing her favorite fuzzy pajama pants and mismatched socks—she sighed and threw on a hoodie.

She always trusted him.

The car ride was quiet.

Soft lo-fi music played from the stereo—Ferb's playlist. Isabella leaned against the window, trying not to drift back to sleep, even as the rhythm of the road and the warm car interior lulled her.

Phineas hummed to the beat, his fingers tapping the wheel, eyes flicking between her and the road.

She glanced at him, bleary-eyed. "You're suspiciously nervous."

"I'm not nervous," he said quickly.

"You're tapping Beethoven's Fifth on the steering wheel."

"…I'm mildly nervous."

Now she was intrigued.

They parked just outside Whispering Pines Park, usually locked up at night. But tonight, the gate stood slightly open.

"I had Ferb reprogram the keypad earlier," Phineas said with a smile.

"Of course you did."

As they walked up the winding path, Isabella's sleepiness began to melt away.

Lanterns floated in the air like glowing jellyfish, suspended by nearly invisible wires. Twinkling lights lined the trees. Flower petals spiraled across the grass in intricate designs.

Soft music floated through the air—a melody Phineas had written years ago, the one he always played when he thought she wasn't listening.

She stopped. "Phineas… what is this?"

He just smiled and took her hand. "Come find out."

The clearing ahead was filled with faces—familiar, beloved faces.

Candace dabbed her eyes with a tissue, Jeremy beside her. Ferb stood near the center, his hands in his pockets, calm as ever. Vanessa leaned into him, wearing a silver scarf and a knowing smile.

Buford was awkwardly hugging Baljeet, who had clearly been crying. Perry wore his signature fedora, perched proudly on a bench. Even Doofenshmirtz was there, holding a camera upside down.

But then—her eyes locked on the people she wasn't expecting.

Her mother, Vivian Garcia-Shapiro, stood to the side in a teal coat over her pajamas, her curls pinned back, eyes shining with emotion. She was next to Linda Flynn-Fletcher, who held a camcorder like she was filming the most important documentary of her life. Lawrence stood beside them, smiling warmly in his suit jacket, hands folded neatly.

"Mom?" Isabella breathed. "You're… you're all here?"

Vivian came forward, tears in her eyes. "Of course, mija. I knew what tonight meant before you did."

Linda smiled. "I've waited years for this."

Lawrence added, "And I brought sparkling cider!"

Isabella turned to Phineas, overwhelmed. "You planned all of this?"

He shrugged with a grin. "Well… Ferb helped. And Vanessa booked the lanterns. And Buford made snacks."

Buford lifted a bag of marshmallows. "Want one?"

Phineas gently pulled Isabella forward. As everyone stepped back to give them space, the lights around them seemed to dim—just a little—focusing everything on this one moment.

Then Phineas reached into his pocket… and dropped to one knee.

"Izzy," he said softly, the name only he ever used, reserved for the quietest, most honest moments. "We've built rockets, time machines, treehouses that bend the laws of physics… but the one thing that's been constant through everything is you."

Tears welled in her eyes instantly.

"I was so busy inventing things that I didn't realize the most important part of my life was always standing next to me, cheering me on. You've always believed in me—even when I was clueless. You've been my best friend, my inspiration, and my favorite person."

He opened a small velvet box.

Inside was a silver ring with a delicate infinity symbol on the band, a nod to the pendant he gave her when they graduated high school.

"I don't know what the future holds, but I know this—I want to build it with you. Isabella Garcia-Shapiro… will you marry me?"

A silence fell.

Isabella's breath caught. Her hand flew to her mouth.

And then—through tears, laughter, and a thousand racing memories—she whispered, "Yes."

Phineas stood and slid the ring onto her finger. The clearing erupted in cheers.

Candace openly wept into Linda's shoulder. Vivian sobbed into a tissue. Lawrence tried to give Phineas a firm handshake, but ended up hugging him instead. Buford screamed, "CALLING IT—I SAID THEY'D END UP TOGETHER!" Baljeet nodded, still sniffling, "I did the math. Statistically inevitable."

Ferb held up a sign he had clearly prepped ahead of time: "About Time."

Afterward, under the stars, everyone mingled near the pond. Linda passed around her homemade brownies. Vivian served cinnamon hot chocolate from a thermos. Perry posed for a photo with the ring.

Isabella sat beside Phineas on the dock, their feet hanging over the still water.

"I still can't believe you did all this," she whispered, turning the ring on her finger.

He grinned. "I had help."

"Even from Doofenshmirtz?"

"He insisted. He also tried to bring a t-shirt cannon."

She laughed and leaned on his shoulder. "You know what I realized?"

"What?"

"This feels like the kind of thing two kids dream up in their backyard."

Phineas smiled, squeezing her hand. "It kind of is."

There was a long pause.

"So," she said playfully, "what are we gonna do tomorrow?"

Phineas looked at her with that same familiar spark. "We're gonna plan forever."