Disclaimer: Hey everyone! This is Snowflake here! I decided to re-write this story, and I definitely own the plot line! I got a bit lost with where I was going with it, so I'm editing the chapters I have posted already and hopefully I will complete it soon!

Sorry for the long hiatus guys!

I, unfortunately, do not own Phineas and Ferb, and I don't own any of the characters.

Summary: What if Phineas and Isabella were together, secretly, and that Phineas' obliviousness was just a cover story for the relationship? What would happen a year into their love story, when someone finally found out the truth?

Chapter 1: Shhh, It's a Secret!

NPOV (Nobody's POV)

It was a normal summer day in the Flynn-Fletcher backyard. The sun was out, the birds were singing, Perry the Platypus was off fighting Doofenshmirtz and there was a contraption being built in the backyard. Today's big idea was an invention to create the nicest, sweetest, sugar and dairy-free drink ever known. Around lunchtime, the invention was complete. Phineas pushed the button to create a jug of the drink, and out came the liquid. Then, from out of nowhere, a medium sized hand dangling from a flying scooter picked up the machine, leaving only the finished product, and the ingredients, on a table in the yard. Candace dragged Linda into the backyard, trying to bust the boys, yet again.

Linda just looked at the table, sighed, and asked the kids: "Who wants snacks?" and everyone cheered and said "we do!"

Phineas and Isabella smiled and looked at each other, knowing what they were going to do next.

"Me and Isabella are gonna tidy up, okay mom?" Phineas called to his mother, who was the last person to go through the door into the kitchen.

"Okay you two, try to hurry before all the snacks are gone!" She called through the closing door.

(Phineas' POV)

Isabella and I had been doing the same routine for the past year now. When Mom calls everyone in for snacks each afternoon, I would make up a reason for me and Izzy to stay outside. I never lie; I just don't tell them everything that we do after finishing tidying up.

(NPOV)

Phineas and Isabella walked over to the table, and started putting the stuff away. When they were done, five minutes later, Phineas walked over the Isabella, put his hands on her hips, and spun her around, so she was facing him. They smiled at each other, and leaned in for a kiss.

Whenever the two kissed, they felt like they were falling in love with each other over and over. Your basic Disney romance. There were fireworks that would put a Phineas and Ferb 4th of July to shame. Their relationship was kept secret, because they both knew that if they told anyone that they had fallen in love with each other, they would ask the cliché line, "aren't you a little young to fall in love?", and they didn't want to hear that. They wanted to be together with no one doubting their relationship. As long as they had each other, they were happy with the secret.

(Candace's POV)

I was looking for Phineas and Isabella, because they had been outside for almost ten minutes. I wandered out the back door and saw a sight I thought I wouldn't see for a few more years: my brother and Isabella KISSING! It was so sweet, so I stayed silent for a few moments just to let them finish their moment.

"I love you so much Izzy. Happy one year anniversary," Phineas mumbled, just loud enough for me to hear.

ONE YEAR? I was shocked that my brother wouldn't tell me her had a girlfriend! I would bet Ferb knew. But then Isabella said something that put my thoughts at ease.

"I love you too Phin. I just don't think we can hide it for much longer. We're older now, maybe everyone will except that we have fallen in love and not try and change our minds."

I realised what was happening. They were hiding their relationship because they thought everyone would say they were too young for love! I thought that was ridiculous, seeing as everyone already basically knew that they were in love, even if they weren't together!

"I know Izzy. We can tell them if you want." My little brother said, with a small smile on his face.

I was happy for the two, admitting their love for each other. I can't believe they hid it from all of us for a year!

(NPOV)

Candace walked over to Phineas and Isabella as they kissed again. She stood a few feet away and cleared her throat. It was quite comical seeing the couple jump apart, eyes bulging out of their sockets. They action was so fast, Phineas ended up falling over. Both girls rushed to help the boy up, each grabbing one of his hands.

"Uh, hi Candace." Phineas stuttered to his sister.

Busted!

The teen redhead just grinned.

"I knew it! I always knew you to would end up together!" Candace told them with lots of energy.

This brought a smile to the two kids' faces as they looked at each other with relief.

"So… when are you going to tell the others? I know why you didn't tell anybody, but for a whole year?" Candace questioned with a grin still on her face. "You two must be the best actors, like, ever! You fooled us for a whole year!" She turned and pointed to her brother, "everyone thinks you re the most oblivious boy on the planet! In the universe even!" She then turned to Isabella. "And everyone thinks you are hopelessly in love with him, which I guess is true..."

Phineas and Isabella looked at each other with love.

"Candace," Isabella began timidly, "do you think we're a little young to fall in love?"

"Nope. The best relationships start out as just friends. Everyone already knows you care for each other very deeply, and you shouldn't care about what others think. Anyway, since when have you guys and your friends ever cared about being too young to do anything? You've proved the impossible many times this summer, and falling in love so young isn't impossible. Remember the day we travelled around the world? You just have to believe!" Candace told them, a small smile on her face as she thought about that day, and Jeremy. She knew it wasn't impossible to fall in love young, and she knew that if anyone could make it work, it was her brother.

Phineas and Isabella both had different reactions to the reminder of the eventful adventure. Isabella grimaced while Phineas had a small smile on his face.

"Ooops, I forgot about 'The City Of Love' and Phineas' meltdown on the island. Just remember to believe in yourselves, and you guys can do anything!" Candace encouraged.

After exchanging looks, Phineas answered his older sister's previous question. "We'll tell them soon. But Candace, let us do it please."

Candace nodded her head in understanding.

As the three made their way inside the house, Isabella and Phineas began discussing ways to reveal their relationship.