"No, No and, let me think again ..." Blaine gave a dramatic pause. "No! There's no way we gonna do this."

"Blaine ... Calm the fuck down" Kurt whispered angrily. "What you have on your head, for Merlin, stop Screaming!"

Kurt looked around the room, there were not many people around. A Gryffindor here, a Ravenclaw there, but none of them seemed to hear them.

Blaine took the tallest boy's hand - making Kurt blush really hard - and led to a restricted area of the library.

"Kurt, please... you can't d-" The Hufflepuff started.

"Hey," Kurt murmured "Stay calm, it's innocent, it's not like I'm inflicting a rule or something."

"Kurt," Blaine asks shyly. "Why did you really want to do this?"

"I need to find a way to make Karofsky and the others back off, I need to find their weak point, and there's no better way to find it than becoming them and getting in their common rooms. To search. I'm brilliant"

Blaine looked down, sighing heavily, he knew arguing with Kurt is a losing battle, when the boy puts an idea in his head nobody can change his mind. But he had to at least try to prevent his best friend do something he'll regret later.

"Kurt, revenge isn't cool ..."

"Bl -"

"Let me finish, you're better than him, Do not stoop that way, please, if he finds out." He pauses, swallowing hard. "Kurt, you're my best friend, if something happens to you, I will never forgive myself."

"Stop ... just, stop, Blaine ... I'll be fine, don't worry, He will not find out, I'm promise." Kurt said, holding the boy's head in his hands and puting their foreheads together.

"But what if ..." Blaine whispered, almost inaudibly.

"Do not ..." Kurt muttered.

"But what if, Kurt, what if he finds out ..."

"Blaine," Kurt said "I know defend myself. And besides, I'm pretty good at potions ... Are you doubting my abilities, Anderson?"

"Not at all, Hummel" The smaller boy mumbled, still tense.

"C'mon B." The slytherin said, moving away "Don't be like that."

"Bu-"

"No buts, Blaine, if you don't want to help then go away." He shouted, looking straight into the eyes of the boy before him. "So?" Said impatiently.

Blaine stood and spoke slowly. "I do not agree with it, with anything of this, but I'll NEVER let you do that, not alone anyway."

He picked up a book on the shelf, was a big, old and torn, it seemed that no one read, for at least a thousand years.

"Okay ... let's see ... polyjuice potion, polyjuice potion" Blaine said to himself, trapped in his own world, still mad at Kurt.

Then, past four minutes, the silence is broken by a Blaine excited.

"I FIND IT!" He says.

Kurt smiled at the boy sitting in front of you. Looking at the recipe on the shoulders of Hufflepuff.

"This is ..." Blaine started, after analyzing the recipe.

"Really complicated." The slytherin completed.

"Ugh, how long?" Blaine asked.

"A month, at least, need to get the ingredients and everything."

*** One Month later ***

Blaine entered the forbidden corridor on the third floor and found a boy sitting with a cauldron, the boy looked up and saw him.
"I thought you'd given up," Kurt muttered, "You're late, you had to have come here ..." He looked at his watch, checking the time "40 minutes! Where were you?"

"Professor Roz kept me longer in the class, and when I was coming some boys started making joke of me and-" Blaine said.

"Aww, Blaine, you're okay?" Kurt asked.

"Yeah, Santana was there ... she Helped me ... I'm a little tired, but, whatever."

"Do you want to talk about it?" The slytherin offered.

"No, no, I'm fine, let's do this" he said with a smile pointing to the cauldron.

Kurt poured two glasses with the potion, and gave one to Blaine.

"cheers" Both said, toasting before drinking.