A/N: I know I said one-shot, but I decided to make this a two-shot instead because I couldn't resist.
Disclaimer: I don't own PnF.
When Phineas got home, Ferb was waiting for him on the couch. He put down the book and said "So, how was the date?" "It was...interesting." said Phineas, still sort of surprised by Isabella's spontaneous kiss. Ferb raised an eyebrow. "Well," said Phineas "I took her to the restaurant, just like I planned; I took her to the movie, just like I planned; then, when I brought her home, she kissed me...not just like I planned." Ferb smirked, and Phineas said "Hey, don't look at me like that, I had no idea what it meant." Ferb face-palmed himself and sighed. "Ok, so I still have some room for improvement in love." said Phineas "What can you expect me to do?" Ferb pulled out a DVD from nowhere and handed it to Phineas. "The Amazing Spider-Man?" said a confused Phineas, looking at the title. "What am I supposed to do with-" Phineas stopped suddenly as he figured out what Ferb wanted him to do. "Oh! I get it! Thanks!" he said as he ran upstairs.
Next week, Phineas put the plan into action. He and Isabella were the only ones around today, since Ferb was at another debate camp with Perry, Candace was out at the mall (probably for hours), his mom and dad were at the shop for something he couldn't remember, and Buford was at the park (he mentioned something about wondering how many elastic waistbands were needed to launch a nerd to the moon). He went up to Isabella and said "Hey, since nobody's here, wanna watch a movie with me?" "Sure." said Isabella. They both went into the living room and popped the DVD in. "The Amazing Spider-Man." said Isabella "Good choice." They started watching the movie, sitting closely to each other. Then, Phineas slowly grasped Isabella's hand. Isabella noticed and smiled. About halfway through the movie, at one of the romantic parts, Phineas looked at Isabella directly in the eyes, as did she, neither noticing the blue beam hitting Phineas. Then, as Peter and Gwen kissed on the screen, Phineas leaned in and kissed Isabella. Isabella was a little surprised at first, then relaxed and let it last a while. Then, as they pulled away, Phineas whispered "I think I love you." "I know I love you." said Isabella, smiling.
At DEI, Doof was lying on the ground, with the remains of his Courage-Inator scattered around the room. Since Perry was gone at camp, they had sent in a replacement agent, Marvin the monkey. "Man, that monkey can thwart." said a defeated Doof.
How'd you like that two-shot?
Please R&R!