Hey, random reader. I probably don't know you, but I know that you're awesome. Why? Because you're reading this story, that's why XD. Anyways...I'm planning on updating this story every week, so stay tuned for more. And many thanks to PianoMan5 for Beta-ing this fic.

Disclaimer: I don't own Phineas and Ferb.

For years, philosophers have pondered the answer to a seemingly unsolvable conundrum: what happens when an irresistible force meets an immovable object? A difficult question for anyone to answer, but what if the circumstances where different? What if the immovable object was totally unaware of the irresistible force? What then?

The relationship between Phineas Flynn and Isabella Garcia-Shapiro is a perfect manifestation of this question. Isabella, the cutest girl on two separate worlds, is irresistible to everyone. Everyone except for Phineas. The boy remains unaware of Isabella's affection because has a powerful weapon of his own: his obliviousness. And a weapon that has stymied the efforts of Isabella numerous times is immovable indeed.

So, what will happen when they take a trip to the movie theater together? Will the irresistible force prevail, or will the immovable object remain adamant? Well, read on to find out...

Chapter One

"Phineas, hurry up, the movie's about to start!"

Phineas hastily walked through the dark movie theater, straddling a huge bucket of popcorn in one arm and two drinks in the other. Weaving around straggling patrons as he walked up the dimly lit aisle, he finally managed to wiggle his way into the seat next to Isabella's.

"Phew! Just made it. I thought the movie started already," Phineas said as he handed her a drink.

"Nope, you came just in time. It's just previews so far."

"Good, cause I don't wanna miss a second! They say this Space Adventure movie is the best one yet, and there's a new character from the comic strips in this one that's introduced too! Plus, Clive Addison said himself that the special effects are gonna be crazy! Aren't you excited?"

Isabella sighed dreamily. Of course she was excited, but it wasn't because of the movie. She could care less about robots and hyperspace ships and interstellar politics. All she cared about right now was the boy sitting next to her.

Time to put my plan into action, Isabella thought. Putting on an adorable face and batting her eyelids, the cutest creature in the universe prepared to charm the boy next to her.

"I'm really excited to be here. I mean, just you and me, alone, in the dark...Isn't this nice?"

Phineas scratched his head. "Well, not really. I mean, the lights will only be out for a couple of hours..."

Isabella did a double-take. "Wait, what're you talking about?"

"You said 'Isn't it nice being alone in the dark?'. I just answered you..." Phineas trailed off, looking at her like she was the one who was missing something.

Isabella just looked at him with disbelief. Only Phineas had the skill to misinterpret something so completely. Just one of his many talents,she thought wryly.

Let's try this again. "So Phineas...We're sitting here...alone..."

"You've established that..." Phineas said slowly.

"Well, don't you know what they say about a boy and a girl when they're alone together? How romantic it is?" Isabella had pitched Phineas the ball: now all he had to do was connect.

"Wait a minute, you lost me. How is it possible for a boy and a girl to be alone and together at the same time? Don't you think that statement's a bit oxymoronic?"

Steee-rike!

"It's not about the word choice, Phineas," Isabella said with just a tad of exasperation. "It's about the principle. Didn't you hear what I said about romance?"

"Romance?" Phineas spoke the word like a tourist in a foreign country trying out a new phrase in a different language. "What're you implying?"

"Oh, never mind!" Isabella sat back with a disgruntled look on her face and crossed her arms over her chest. Conversations with Phineas tended to end up this way: Isabella frustrated and Phineas scratching his head.

Isabella's angry dismissal succeeded in ending the conversation. The pair sat in silence, sitting through a couple minutes of boring theatrical trailers and waiting for the movie to begin. Isabella took a sip of her drink, moodily mulling over her Phineas-related quandary.

It was amazing how such conflicted emotions arose whenever she was in Phineas' presence. Countless unwitting rejections, unrequited gestures of affection, and hours of moping about Phineas' obliviousness were often the results of conversations with the redheaded inventor, but yet Isabella still hadn't given up hope. She just couldn't help strong feelings that came with the mention of his name.

Phineas was just so...Phineas. Everyone knew that he was smart and gifted, remarkably talented with a drill and even more so with a sheet of blueprint paper in front of him. Those qualities didn't weren't the ones that drew Isabella to him, though. It was his happiness, his unending optimism, his incessant need to make the lives of others around him better, that really made her swoon. It was like his day wasn't complete until he had made somebody around him happy.

Isabella's mood involuntarily lifted as more and more thoughts of Phineas came to her. His hair that was a shade between orange and fiery red, the adorable way his eyebrows scrunched up when he was deep in thought...

And just like that, Isabella's bad mood was gone and she was off in Phineas Land. That was another thing that Isabella found unique about Phineas. The boy who was the inadvertent cause of her frustration was also the resolution of it. A bit paradoxical, but that was Phineas for you.

Said boy, on the other hand, was puzzling over a different issue. Something strange that Isabella had said during their earlier conversation had stood out to him, and no matter how hard he tried to dismiss it and return his attention to Space Adventures, that thought kept distracting him.

He debated sharing his question with Isabella, but for some reason this notion made him inexplicably nervous.

Finally he worked up the nerve to speak up. "Isabella?" he said nervously, pulling at his collar. The girl to his left jerked a bit in surprise and turned her attention to him. The eye contact temporarily made him regret speaking up, but he forced himself to finish voicing his thoughts. "What were you talking about earlier?"

"Huh? When earlier?" Isabella replied, confused by his seemingly random question.

"You know...when you were talking about romance and being alone and all that. 'Cause it seemed like you were...well...I kinda got the impression that you were talking about...uh...something-something about...us..." Phineas trailed off into silence, but Isabella got the gist of what he was about to say.

She was, in a word, gobsmacked. Phineas had actually noticed?Phineas the oblivious realized that she had been flirting? Still surprised, Isabella observed his body language. He couldn't seem to meet her eyes, his right hand was playing with his collar, and his left arm was twitching on the armrest. Needless to say, this was uncharacteristic of the normally self assured boy.

Could it be...? An ecstatic, almost wicked grin spread across Isabella's face, and a feeling of delight washed away the remnants of her agitation. Maybe he's (*squeal*) finally coming around!

She decided to test out her theory before she jumped to conclusions. There were many times in the past that she had gotten her hopes up, only to be left utterly disappointed.

Isabella scooted as close to Phineas as the armrest would allow and leaned towards him, near enough to evoke discomfort. "Talking about what, Phineas?" She gave him a smile more radiant than a full moon and fluttered her eyelashes a bit. Maybe she was overdoing it a bit, but she had to see if her overt flirtation would elicit a response from Phineas.

"I-". Unfortunately, it was at this moment that Murphy's Law decided to make its presence known. A maniacal screech went up in the theater, louder than a school bell and even more dangerous to the ears.

"IT'S STARTING! IT'S FINALLY STARTING! YES! YES! YES!"

Dumb with disbelief at the horribly timed interruption, Isabella hoped desperately that the loud alert hadn't put an end to Phineas' intention to share his thoughts.

No such luck. As soon as the crazed voice ended its shriek, Phineas abruptly stopped speaking and turned towards the screen with an excited look on his face, totally forgetting that he had just been conversing with Isabella seconds earlier.

It would have been accurate to compare Isabella to a steam kettle at that moment. At the moment she was calm. Unmoving. Unthinking. An unknowing onlooker might have mistaken her mood for serenity. Isabella sat in rejection for two minutes, unaware of the opening credits, of the introduction, of the famous Space Adventures music score.

Then, the anger set in. Slowly, like lava crawling down the side of a volcano, Isabella's ire built up like a fire. Her fists clenched slowly, her jaw clenched, and her body began to tremble. WHAT THE HECK! Of all the times to interrupt, the idiot chose THAT moment to do it! I mean, how cliché can you get?!

Phineas had been so close to coming around, but then that...personhad screamed away Isabella's chance of getting a confession of love from Phineas

Ok, maybe she was being a bit unrealistic, but Isabella could hardly be blamed. For the first time in forever it had seemed like Phineas was coming around. It was understandable for her hindsight to be optimistic, given the circumstances.

She couldn't remain bitter for long, though. Not while in the presence of Phineas. Isabella glanced at him. The embodiment of obliviousness sat in a catatonic state, jaw open and on the edge of his seat, completely captivated by the movie. I wish he looked at me like that, Isabella thought wistfully.

With a dreamy sigh, the Fireside Girls' troop leader took in the boy next to her. It was strangely hypnotic looking at Phineas, his features lit from the glow of the screen. The dim light accentuated the allure of his features, especially his eyes. They were even more entrancing reflecting the images on the screen. Isabella could make out distorted images from the movie-

And suddenly, Phineas' eyes were reflecting something much different than the images on the screen. Without warning, his head snapped in Isabella's direction with the speed of a viper. She was so totally caught off guard that she couldn't even pretend that she was staring at something else.

"Isabella, what are you doing?"

"I...I was..." Isabella couldn't even get out a sentence. He caught me STARING at him! And not just staring, OGLING him. He must think that I'm creepy or something!

"How come you're looking at me like that?" Phineas asked questioningly.

Isabella's face heated up as she realized that she was still staring at him. She quickly turned away from him, staring straight ahead at the screen. Her embarrassment was growing by the second, made even worse by the fact that Phineas was still looking her way.

Isabella glanced quickly at Phineas and then back at the screen, desperately trying to quash the redness on her face. "I was...well, I was...looking at you."

"Well, obviously, but why?" Phineas expression was that of absolute bewilderment and confusion, at a loss for any possible reason for why his best friend was staring at him. "I mean...am I really that fascinating?"

Isabella looked at Phineas in shock. Did he just say that? Observing his features, she could discern no hint of sarcasm or jokery. Isabella laughed to herself. Phineas had actually figured it out, but somehow he had managed to figure out the reason for Isabella's enthrallment without realizing the obvious answer to why she was captivated by him.

His obliviousness has reached new heights. Isabella actually chuckled out loud at the thought. Once more, Phineas had done the impossible.If he's actually this oblivious...

She entertained the thought of making up some unbelievable excuse that Phineas would inevitably believe, but for once she decided to just answer his question truthfully. "Yes, Phineas. Yes you are."

If Isabella hadn't been in such a delicate situation, she might have found it mildly hilarious to see the changes of expressions that the redhead's face was undergoing. From confusion to nervousness, Phineas tried desperately to figure out what was going on with his friend. He was one variable away from figuring out the complicated equation that would explain her behavior, but the clear answer evaded him endlessly.

The one thing he didn't need was another confusing action directed his way, but that's exactly what Isabella gave him.

"So Phineas," she said so sweetly that it was unbearable, "are youfascinated by me?"

Phineas couldn't even begin to try to think of a response. This was just too much for the poor boy. He was already distressed enough, but the breaking point came when he felt Isabella stroke his arm.

Under normal circumstances Phineas would never had considering doing what he was about to do, but the events of the day had addled him to the extreme. The culmination of emotions, the confusion, the anxiety, the strange turning of his stomach, finally made him snap.

In a quick motion, Phineas harshly shrugged Isabella's hand off his arm. "Look, Isabella, I don't what's going on with you, but just...stop! The looks, the questions, the closeness... I-You keep doing all this to me-" He gestured wildly with his hands. "And I can't take it! Do you know how confusing this is? Just...stop!"

As soon as he had uttered these words Phineas regretted what he had just done. His split second reaction to Isabella's actions may have been spur-of-the-moment, but it was too late to change anything now. The damage had been done, and now all he could do was hope that she wasn't too mad.

And then he looked at her expression and his hope died.

The look on Isabella's face was just too distraught to describe. Her expression was the epitome of despair. Her mouth hung slightly in shock, her hands hung limply at her sides. The normally cheerful look on her face was gone, killed off faster than a bird at the hands of a wolf. The worst part, though, was how she looked ar him. There was no anger, no condemning, no sadness, just...nothing. It was like all the fire in her was gone.

With a horrible feeling of guilt rising in him, Phineas tried to rectify the damage he had done. "Look, Isabella, I didn't mean to say all that, I was just-"

Phineas found he couldn't continue. Isabella just kept staring at him with that expression. Her blue eyes were like stones, inanimate, dull, motionless.

After an eternity, Isabella broke eye contact with him. With stiff, mechanical movements, Isabella stood up out of her seat. Without even looking at him she walked past his chair and all the way down the aisle.

With a look of despair Phineas rushed after her, ignoring the movie, ignoring the popcorn and drinks that had been left behind, ignoring the looks of annoyance that he was getting for disrupting the movie, ignoring everything but Isabella. Irony really did have a way of manifesting itself at the worst times.

Phineas continued his pursuit of Isabella as she walked out of the theater, grimacing at the sudden change of light. He weaved through the few people that stood in the theater lobby until he finally caught up with her.

"Isabella, wait! I-".

Isabella whipped around to face Phineas, and he was shocked. She was crying. Isabella Garcia-Shapiro, strong spirited, indomitable leader of Fireside Girls troop number 46231, was crying. Her eyes were red and tears were running down her cheeks, silently falling to the ground. An intense sense of wrongness shot through Phineas painfully, so sharp that he felt tears start to form.

"You what, Phineas?" Her tone wasn't accusatory or condemning or angry. The only thing that was present in Isabella's tone was sadness. Infinite sadness, and something else that he had some trouble identifying until it came to him. Resignation. It looked like she had given up on something, or rather, given up on him.

The normally cheerful boy was rooted to the spot with guilt, horribly aware that he had done something terribly wrong. He didn't realize the full extent of his mistake, but judging from the look on Isabella's face, it would take more than an apology to make reparations.

All he could do was look at her, trying to think of something to say to make things better, but any words of apology he tried to formulate died before he attempted to utter them.

After an eternity Isabella finally turned away. Phineas was seized with a panic-like urge. Desperately he grabbed her hand, hoping that the gesture would do something to console Isabella, knowing all the same that it was probably useless.

Sadly, his prediction was right. Without even a backwards glance Isabella softly, almost delicately, broke the contact between the two and continued walking. Helplessly Phineas' gaze followed her she continued to walk away from him until finally, with a feeling that felt even deeper than sadness, he followed her out of the theater.

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