Phineas and Ferb

It was a typical summer day in Danville (or Trishtanie). Phineas and Ferb were thinking about what to do in the yard today, looking at their blueprints for previous inventions (which each miraculously disappeared before their mom arrived in the yard or wherever the invention was). Candace was in the shop with her mom, trying to catch her breath from the countless harassments of her brothers. Perry was lying next to Phineas and Ferb, simply sleeping. And then, Isabella walked into the yard.
Isabella (calmly): Hello! What are you doing?
Phineas (turning to Isabella): We don't know yet. But I think we'll figure something out soon. Or something will land from the sky and tell us what to do today , he probably joked. But a few moments later, something did indeed fly out of the sky and land in the yard near a tree. The three of them approached the creature on the ground, and after the smoke cleared from the dust, they saw that there was a person there. Or at least someone. It was lying on its back and coughing from the smoke. And it was you. You, a traveler through the universes, and suddenly you were carried into some wormhole that forcibly threw you into this world. All three of them looked at this situation, not knowing who you are? Where are you from? And why are you here? But before anyone could speak, Phineas suddenly turned around, looked around, and asked (slightly coughing from the smoke): "Hey, where's Perry? " While everyone was distracted, Perry left and received a task from Monogram: Doofenshmirtz is up to something again, and he needs to figure it out and stop him. And he's already on one of his means of transportation (currently a feather plane), heading to the building where Doofenshmirtz lives and also houses his lab. Just like every other day. A couple of hours of work, and then back home to the carefree life of a pet. After today's secret agent mission, which no one knows about except his superiors at the agency.