I'm rewriting this first chapter. There won't be any final boss. There will be a bit of trouble, but it's mostly wholesomeness.

For the sake of this story, voldemort was defeated a lot earlier. And Percy is 25.
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A year past by during hogwarts and it wasn't without trouble.

Percy was too old to be a student, so he became a teacher instead after being taught magic.

No one in the school liked him due to him being the grandson of voldemort.

Which brings us here to now.
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Now Percy is teaching his (random class) and it's his fourth day at hogwarts.

He's feeling frustrated at the students refusing to listen to him.

"Hermoine, Harry and Ron off to detention!" "How dare you?!"

Harry shrugged. "It's true" "You're a terrible person!"

The three left without a word. Percy sat back in his desk exhausted after class was dismissed.

It was lunch time and he'd lost his appetite.

He walked around till he eventually found a private room. There he threw a coin into the fire.

"Show me Annabeth chase"

The pot shimmered before it did so.

Percy found himself smiling upon seeing her.

He sighed unknowingly and Annabeth whipped around.

"Percy?!" She laughed. "How's my seaweed brain?"

She frowned upon joining his thin form and deep eyebags.

"Percy are you ok?! What happened?!"

Percy began ranting and as Annabeth listened and kept frowning.

"These kids have no manners"

What the two didn't know is that the trio were listening in. The three began to misunderstand.

As soon as Percy stepped out they bombarded him.

"We knew it! Who are you?!" Ron asked, glaring threatingly.

"You're conspiring with that woman to revive voldemort somehow!" Hermoine added.

Percy glared, making them flinch.

"First you invade on my privacy, then you accuse me of working with voldemort?!"

"Just because I'm his grandson doesn't mean I'm evil!"

"It's the same with Draco! You should know better!"

Percy intended on slapping each of them, but settled on heavy punches, leaving them shocked.

He then left, a scowl fixed on his face.