I do not own anything. Percy and Annabeth belong to Rick Riordan, and Sam and Dean belong to the producers of Supernatural.

Chapter One

Percy Jackson was scared.
Over the past years, he'd killed monsters, fought titans, and calmly faced death at least once a day. None of these things made him as nervous as his first day at school did.
He looked up at the sign on the building that said "Goode High School". It took Paul Blofis, his mum's boyfriend, a long time to convince the principle that the fire in the band room wasn't Percy's fault (long story) and that he should be given a second chance.
And here he was, standing in front of the brownstone building, hoping that this time there would be no monsters at the school. Being a demigod was pretty hard.
Okay, he thought. No point delaying this.
It was time to go to class and pretend he was just a normal kid.

'Hey, so get this-' Sam Winchester said as he closed the newspaper.
'Sammy, we can't work on a case now,' His brother, Dean, reminded him. 'We have to find Lilith.'
'And how's that going, Dean?' Dean glared at him.
They were having breakfast at a small restaurant in Utah. They had gone there in their search for the first demon, Lilith, who was causing havoc everywhere.
Sam continued. 'Look, we have no clue as to where she might be. In the meantime, we can go to New York.'
'What's in New York?'
'There have been a lot of problems there lately. I mean, something's definitely wrong. And in the past week three bodies were found; all of them male, pretty young.'
'So?' Dean looked bored. 'A psycho's killing men. Doesn't have anything to do with us.'
Sam shook his head in exasperation. 'If that had been the case, I wouldn't talk to you about it. The bodies were drained of blood.'
Dean raised an eyebrow. 'Vampires?'
'Probably.' Sam agreed.
'Good,' Dean got up, throwing some money on the table. 'We can finish them and get back to killing Lilith. I mean, it's not like she's dangerous or anything. She just wants to raise Lucifer from his cage in Hell.'
Sam rolled his eyes.

'Percy Jackson!'
Percy nearly jumped out of his chair. He looked around him at his fellow students. Some of them were snickering; others looked sympathetic. Then he focused his gaze on the science teacher, Mr. Thomas. The teacher's rat-like face was red with anger.
'Yes?' Percy said, which only seemed to make the teacher even angrier.
'I know you are new to the school,' Mr. Thomas's voice rose with each word. 'But I will not tolerate students sleeping in my class!'
'I-I'm sorry, sir. It won't happen again.'
'It better not,' replied Mr. Thomas. 'You are staying today for detention. The next time I will not be so forgiving.'
'Forgiving?' Percy muttered under his breath.
'Did you say something, Mr. Jackson?'
'No, sir.'
Mr. Thomas glared at him for another moment and then returned to the front of the class.
He couldn't believe he just got a detention. On the first day of school.