Percy stepped into his apartment, the air buzzing with excitement. Camp Half-Blood friends filled the room, laughter and chatter bouncing off the walls. Annabeth was adjusting a "Happy Birthday" banner, while Grover fiddled with his panpipes. Tyson, Thalia, Reyna, Clarisse, Leo, Will, Nico, Bianca, Piper, Hazel, Frank, and Percy’s mother, Sally, were all gathered, a tapestry of smiles and anticipation.

As Percy walked in, the room erupted in a chorus of "Surprise!" His eyes widened, a genuine smile lighting up his face as he took in the scene. He hugged Annabeth first, his gratitude evident in the tight embrace. The others swarmed him, offering gifts and good wishes. "Happy birthday, Seaweed Brain," Annabeth said, her eyes twinkling. "Thanks, Wise Girl," Percy replied, trying to keep his voice steady.

Grover handed him a small box. "Here, I made this for you. It’s a charm for protection." Percy grinned. "Thanks, Grover. I’ll need all the help I can get." As the celebration continued, Percy stole glances at the doorway, his smile faltering for brief moments. He was surrounded by his closest friends, yet his heart ached for the one who wasn’t there. Sally noticed his distraction. "Everything okay, Percy?"

"Yeah, Mom," Percy lied. "Just a lot to take in." When the cake was brought out, candles flickering in the dim light, Percy made a wish. The room cheered as he blew out the candles, but the wistfulness in his expression was evident. He looked around at his friends, grateful yet incomplete. "Make a good wish?" Tyson asked, beaming. Percy forced a smile. "The best," he said, though his thoughts were elsewhere. It was a bittersweet celebration, a reminder of the bond he shared and the void the absence created. Percy’s strength lay in his ability to hide his pain, but tonight, amidst the joy, his longing was unmistakable.

Despite the joy and laughter filling the room, Percy’s heart ached with an undeniable sadness. He couldn't shake the feeling of emptiness. Where were you?