Isabella skipped happily to the Flynn-Fletcher's house, her heart pounding wildly in her chest. She was let in, told Phineas was upstairs, and quickly made her way up, her smile and excitement growing with each step she took. Once in the bedroom, Phineas was still working hard at the desk.

"Hey, Phineas!", she said happily.

The sudden sound of her voice made Phineas jump a foot in the air before whirling around and standing up to block his project in surprise.

"Oh! Isabella!", he said quickly. "Um. Whatcha doin here?"

Isabella couldn't help but giggle at this as she came in, holding out the valentine and saying, "Happy Valentine's Day!"

Her face turned pink as Phineas took the heart-shaped card, looked it over and then smiled back at her. The simple action slightly deflated her attitude but it changed as he began to speak.

"Thanks. Happy Valentine's Day to you too.", he said, pulling out his mysterious project.

What he pulled out made Isabella jump back with a shriek of terror. Phineas was quick to explain though as he handed it over.

"It's not real!", he said, pointing at the mechanical heart that thumped timely in his hand. "It's fake. I mean, yeah. It LOOKS like a real heart. A human heart, y'know? But it's just a machine. It looks and acts real, but it's just metal. Go ahead. Touch it."

Isabella only stared at the small mound of metal for a moment before gingerly reaching out and gently tapping it. She stroked a finger across and found that it was, indeed, metal.

"I've been working on it all morning. Happy Valentine's Day.", Phineas said, cheerfully as he placed it in her hands.

The young girl's eyes wouldn't leave the heart. It beated contently in her hands, pulsating while doing so and after a moment, her eyes finally lifted up to the beaming young inventor who was obviously waiting for her normally given praise. But that wasn't the case.

"...I can't believe you!", she finally said, as her surprised face turned into a scowl.

Phineas's own expression changed as he blinked cluelessly at her, "...What?"

"I can't believe you!", she said again, louder this time. "I can't believe you're that dense!"

Phineas couldn't help but be shocked as he took a step back, a hurt expression crossing his face.

"D-dense?", he asked quietly.

"YES! DENSE!", the girl shouted at him. "All year long- From the moment we first met, Phineas Flynn, I've been trying to tell you I love you! But you've always been so oblivious to me! To my attempts! I asked if you thought if I was cute and just resorted to science and logic and facts! I asked you to the movies and you go and morph with your brother or put me off till you finished a stupid robot dog! I wanted to dance with you, ROMANCE. Phineas! ROMANTIC DANCE and you bring your brother along like I could really dance with TWO guys at once! No matter what I say or do you always ignore me! I'm sick of it! I knew you were dense but I didn't think that today, of ALL days out of the year, the most romantic day of all, you would be SO dorky you would ACTUALLY make a human heart to pass out as valentines! What's with that?! That's not romantic! That's disgusting! Yes, I can roll in the mud, get oily, and sweat to death and not mind but I AM a girl and a hunk of metal fashioned to look like a human heart is just flat out DISGUSTING, Phineas!"

Phineas only listened, his eyes wide with surprise at the outburst. Hurt by what he's done and caught up in her rage, tears swelled up into Isabella's eyes and flew from her face as she ran out of the room. The young boy wanted to speak, to say something, but as he saw her left, he only sighed and hung his head.

'Give her time.', was all Phineas could say to himself. 'Give her time.'