-Later that Day-

Phineas and Ferb were sitting under the tree in the backyard.

"Ah, this brings me back into the old days. Remember Ferb?" Phineas asked.

"Yep. 6 years ago, that summer, we were sitting under this tree almost every day." Ferb replied to Phineas.

"Hey guys." Buford said as he, Baljeet and Isabella came into the backyard.

"Hey." Phineas and Ferb said to them.

"So what are you guys up to?" Isabella said.

"Nothing. We're just sitting under this tree and remembering being under here during the summer, 6 years ago. Can't you believe how young we all were back then? Now look at us. We're teens, we're all close to graduating high school, and then we're off to college." Phineas said.

"Wait, Phineas, you'll be graduating high school too?" Ferb asked.

"Well, I explained everything to my high school teacher and she didn't really get mad, considering that I almost died because of yesterday. So, I'll still be graduating, but I'm going to take a month of summer classes." Phineas said.

"Wow, I didn't even know you could do that." Baljeet said.

"Me neither. But I guess it doesn't happen very often." Phineas said.

Isabella, Buford and Baljeet sat down next to the tree with Phineas and Ferb.

"So are you guys going to be doing anything during summer after Phineas gets out of his classes?" Isabella asked.

"Well, we're growing up still. And we have to look for a good college and stuff. But Ferb and I aren't giving up on building. But maybe we need the time to do new things and start getting ready for the future." Phineas looked at Isabella and put his arm around her.

"You're right Phineas. We do need to try new things in our life. And get ready for the future." Ferb agreed.

"Why do you think we're step-brothers?" Phineas asked Ferb.

"Hey, what happened to that Doof guy from yesterday?" Buford asked.

"He didn't die, but he's in the hospital. They said on the news. Let's just hope we don't deal with him ever again." Phineas said.

-News-

"A lab has been destroyed because of a self-destruct button pressed by… who again?" The news lady asked Doofenshmirtz, who was wrapped up in casts.

"PERRY THE PLATYPUS! I TOLD YOU LIKE 10 TIMES!" Doofenshmirtz shouted. His face was also wrapped up in a cast so it was hard to hear what he was saying.

"Glary the Nanopus?" the lady guested.

"CURSE YOU PERRY THE PLATYPUS!" Doofenshmirtz shouted.

"And now, back to the weather." The lady said.

-Backyard-

"Yeah, I don't want to lose you again." Isabella said to Phineas.

"You see why I like you?" Phineas asked Isabella. Phineas and Isabella shared a quick kiss.

"Okay, just because you two are dating now, doesn't mean you'll have to date in front of us." Ferb told Phineas and Isabella. Everyone started to laugh.

"Today is the best day ever!" Everyone cheered out loud.

The two step-brothers may have gotten into a big fight, but fights can always be fixed. No matter what, you can make up with anyone. Even after 6 years, Phineas and Ferb have plenty of things that will happen in their future.

Phineas will start dating Isabella

Phineas, Ferb and the others will graduate high school

They will go off to college

And everyone will have a good life.

Not to mention, they'll have plenty of best days.

It's always good to believe in something.

Especially the impossible

THE END

I hope you all enjoyed reading this. And if you ask me for sequel, look on my profile for your answer. Thanks for reading and post those reviews!