AN: Okay everyone, I know I have many stories in the works already but I couldn't help myself. This story is a AU Fem!Luke story. I love pairing Percy with others beside Annabeth (though I already have a Percabeth story up to show my love for the canon pairing as well).

I unfortunately can't write slash to save my life, I love reading it (especially Luke/Percy) but I can't write it. So I made Luke a female; there aren't many stories where he's a female anyway.

Anyways please, read and review.

Oh, and changes to ages so as to not make Luke seem like a creeper. Percy's age will remain the same. Luke, or Lucia in this story, on the other hand, will be younger. She'll be turning fifteen by the time Percy arrived at Camp. So the age difference will be three years.

Chasing Yesterday

Prologue: One More Time.

It hurts, was Percy's first thoughts when he was flung backwards, dazed from the impact. Then his next thoughts was: Ridiculous. He'd braved the Curse of The Achilles, he shouldn't be vulnerable to physical attacks. But that's just it, he was invulnerable to physical attacks; a pain that couldn't compare to the pain of the heart.

Lucia Castellan , host of Kronos smirked down at him. Percy himself couldn't believe Kronos would take a female body as his vessel—yes, Kronos' a male—but he can understand. Unless Kronos want to wait for who-knows-how-long, he'll just have to bear with it and by all means, Lucia Castellan's body isn't weak.

"Lucia..." Percy murmured. "Don't do this...please—" He pleaded though he knew it was futile. Kronos' smirk faltered slightly, but he brought his sword up anyway, ready to bring it down.

"Stop!" Annabeth yelled. The Titan King spun to face her, slashing Backbiter as he went. Annabeth was able to counter it with the hilt of her dagger hilt, showing just how skilled her best friend was with the knife she was so fond of—a gift from Lucia.

Percy watched with wide eyes as Annabeth held the Titan back, their blades locked. Percy didn't know how Annbeth pulled it off, seeing as she was badly injured already.

"Lucia," Annabeth said, eyes narrowed, "I understand, but you have to trust me."

Kronos growled in fury. "Lucia Castellan is dead! Her body belongs to me, and will burn away as I am released into my true form!"

"Your mother. She saw your fate when you were a baby," Annabeth said, her face determined yet pained.

"Serving me, that is her fate!" Kronos cried angrily.

"No!" Annabeth argued, the pain clear on her face. Percy struggled to his feet, if he just laid there and watch them fight, he didn't know he will take it. He might break down.

"I will kill you, you ignorant child!" the Titan roared and Annabeth smiled sadly.

"You won't though," Annabeth said sadly, but hopeful. "You promised."

"LIES!" Kronos yelled in outrage.

Percy watched struck by anger, shock and fear as the Titan King backhanded Annabeth across the face, before kicking her in the stomach. Annabeth was thrown across the room and hit a pillar close to one of the Olympian thrones.

Kronos glared at Annabeth and raised his sword, prepared to move towards the hurt girl. She was shaking her head as if trying to clear it, Percy was sure Annabeth had hit her head on the pillar. Being kicked in the gut and backhanded by a Titan probably didn't feel too good either.

"Family, Luke. You promised." Annabeth coughed weakly. Kronos' body went rigid, eyes once golden flashed blue—or maybe it was Lucia?, hope blossomed in Percy's chest before he squashed it down ruthlessly—and he stumbled backwards.

"A-Annabeth..." Kronos—no, Lucia murmured. She stumbled backwards, as if she didn't have full control over her own body.

"Lucia!" Percy cried. Slowly, Lucia turned to look at him. Her eyes flooded with relief and grief.

Her blue eyes were dilated, as if she wasn't fully aware of her surroundings. "Percy...You're bleeding..." she murmured, dazed.

"My knife." Annabeth tried to raise her dagger, but it clattered out of her hand. Her arm was bent at a funny angle. "Percy, please…"

Percy gritted his teeth against the pain and surged forward, scooping up Annabeth's knife. He knocked Backbiter out of Lucia's hand who didn't even fought to keep her sword. Percy's sea-green eyes locked with Lucia's sapphire orbs. It seemed as if he was looking at her for an eternity before he finally averted his gaze away.

"The knife, Percy," Annabeth muttered. Her breath was shallow. "Hero… cursed blade…"

Kronos growled at hearing her voice. "Girl..." He whirled around and reached for Backbiter that had spun into the hearth when Percy had knocked it away. Kronos reached for his sword but dropped it almost immediately after. He screamed in pain and collasped onto the ground, breathing hard.

It was the most bizarre thing Percy had ever seen and all he could do was watch as it happen. But then Lucia's voice came back. She turned, clutching her ruined hands. "Please, Percy…" Her pleading eyes made him walked forward, towards her.

"You can't… can't do it yourself. He'll break my control. He'll defend himself. Only my hand. I know where. I can… can keep him controlled." Lucia smiled painfully. "Trust me...Percy...you always do, don't you?"

Annabeth watched, confused. What had Lucia meant by that?

Choking down a sob, Percy numbly knelt beside her. "I...isn't there another way?" He knew. He knew perfectly well what Lucia needed to do. And he can't bear to see it happen.

Lucia didn't answer. Then her body spasm "He's changing!" Lucia's eyes widened in horror as were the the eyes of the other occupants in the room. "The dagger!" She screamed, voice desperate. "Give it to me!"

Percy hesitated a second too long. By the time he managed to unfroze himself from the shock, Lucia's body had already begun to disperse. Lucia buried her face into her charred palms and screamed in pain; Percy found himself screaming in pain as well.

PxL

The golden glow...it was too late. Kronos is already reformed. Percy didn't know for how long he had screamed. Or when did he stop.

It was silent for far too long.

And...where was he?

Percy realized that he was afloat, feeling completely weightless in this endless abyss of white. He looked around, his body and mind numb.

"Percy." Said boy whirled around when he heard the oh-so-painfully-familiar voice call his name. His eyes locked with baby blue eyes. The shade of ice glaciers yet it held warmth in them. Warmth only for him.

"Lucia." He repeated, feeling overwhelmed. Then he broke down as the events of what had happened caught up with him. "I...I failed." He choked. "Everyone's dead now isn't it? And—and you're..." he couldn't bring himself to say the dreaded word to the woman he loved.

Soft, slender fingers cupped his face, wiping tears that streamed down his cheeks. "Its okay..." Lucia murmured softly.

"Its not!" Percy cried. "The world's going to end under the Titan's reign! Everyone, everything is...gone! How can this be okay?"

Lucia grinned cheekily yet it held a tinge of sadness in it as well. "Daughter of Hermes, remember? I'm full of tricks and...also the daughter of the god of thieves. Stealing power isn't beyond my limit."

Percy blinked at her, confused. "What—"

Lucia leaned forward and pressed her lips to his, silencing him efficiently. "Make me fall for you one more time, Perseus Jackson."

Then everything went black.

PxL

A/N: Well? Tell me what you think. The next chapter will be up soon if it receives positive support.