Disclaimer: Will I ever own Harry Potter, or more importantly - Severus Snape? No? I thought not.

Author's Note: I don't know where this story came from. I really don't know.

Summary/ Story line: There is a traitor among the Hogwarts students. But they don't know who. Snape goes under cover and Sirius teaches potions...

Undercover

Chapter Two: Potion's Class!

Sirius walked up and down the classroom, inspecting all the students potion's. While his hands were clasped behind his back, he dropped extra ingredients into Richard Daniels' potion as he passed.

He continued to walk down the isle in between the desks when Hermione's hand shot up for the third time.

"Yes, Miss Granger?" he asked politely.

"Sir, you just slipped wormwood into Richard's potion," she stated as if it was the most obvious thing in the world.

"I did no such thing, Miss Granger," he looked shocked.

"Sir, I saw you myself not two minutes ago. You threw the ingredients in as you passed!" she looked angry now.

Snape was mentally smirking. "Sir," he faked a hurt voice. "You tried to sabotage my potion? I can't believe it. All I ever did was try to please you and this is what you do?" he said dramatically.

Sirius thought of an excuse fast. "Mr Daniels, I didn't try to sabotage your potion. I saw your skill and merely wanted to test your abilities. But now that we've spent five minutes chatting I expect the potion to be useless," Sirius smirked.

"No worries then, Sir. I fixed it while you were speaking to Hermione." Snape smirked this time but Sirius was the only one who could see it.

Sirius gritted his teeth. "Very well then, 5 points to Gryffindor."

"Thank you, Sir."

"Bottle your potions and leave them on my desk," Sirius snapped at the class.

As the chattering students bustled out he heard one of them say "I can't believe Black did that to Richard's potion."

"I know," his friend answered. "Even SNAPE never did THAT."

Sirius was fuming as they continued talking, this time to Snape himself, or rather Daniels.

"Why didn't you say anything to him? You know he did it on purpose!"

"I know, Richard smiled. " just didn't want to make a fool out of him in front of the entire class."

"Aww, you're so sweet," a Gryffindor girl cooed, linking his arm with hers.

Sirius was left gaping like a fish. "Snape's good with girls? And students like me less than Snape?"

He growled and headed to lunch.

As he sat down, McGonagall smiled at him. "How was class?" she asked.

"Don't ask!"

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