AN: Got the idea from reading Full Metal Alchemist. I plan to have eight chapters, where the next seven would be one for each day, and of course, for each sin. This isn't supposed to be in-depth, but something light. Please read and REVIEW, it means the world to me when people review.

Chapter one: The dare

"Happy Birthday to you!"

The sounds of butterbeer and firewhisky corks popping were deafening. Everybody in Gryffindor clutched a bottle of either butterbeer or firewhisky (but there were a few that had one of each in their hand) and was singing happily to the two red haired twins standing in the middle of the Common Room.

April Fools Day-the day where pranks are pulled and mad cackles of laughter could be heard around the world. But in Hogwarts, or rather, in the Gryffindor tower, nobody was pulling any pranks, for today was Fred and George Weasley's birthday-the two mastermind pranksters of their generation.

It was a Wednesday, and normally Hogsmeade visits were on selected weekends, but today there was an exception. Fred and George had cast an illusion spell over the common room to make it seem like every Gryffindor was celebrating their birthday to cover up the fact that the whole House was, in fact, in Hogsmeade.

Fred and George had discovered another way from Hogwarts to Hogsmeade that no teacher knew about. They were generous and decided that everybody from Gryffindor should spend this glorious day outside where they could shop and drink butterbeer as much as they liked.

From the delighted squeals and roars of laughter that stretched from the Shrieking Shack to Honey Dukes, it seemed the Gryffindors were having a blast. The rest of the school, at this time, was seated around their House tables in the Great hall, where they ate roast chicken and drank pumpkin juice just like any other day. If they had known where and what the Gryffindors were doing, they'd turn green in envy.

As midnight drew near, Fred and George gathered everybody and had them snuck back into the castle, as they knew Professor McGonagall was on duty tonight and would surely realise the repetitive sounds and movements of the fake Gryffindors in the common room.

The tapestry in the Gryffindor tower was flung aside as the students crept back in. When the last of them was safely sitting on the sofas, Fred undid the illusion while George ceremoniously held out his school hat for people to dump their presents in.

"That was fun wasn't it?" Fred shouted, in which many cheers and yells of agreement rang back at him.

"Want to do it again next year?" George yelled, waving the hat around, making the presents inside fall out.

"Of course!" People shouted back. Everybody was delirious from the fun, excitement and adrenaline rush they experienced from escaping school.

Well, except for one person.

Hermione Granger pursed her lips as she descended down the stairs from the girls' dormitories. She had refused to participate as it would've broken at least a hundred school rules. Harry and Ron had agreed to go without hesitation, but no matter how they persuaded, threatened and begged Hermione, she was bent on studying her chart for Arithmacy.

"Peeves came in her twice!" She hissed, "If it wasn't that it was you two who lead the whole thing, he would've told on all of you! Including me!"

"Aw Hermione, don't be such a party pooper," George beamed. "Everybody here had a blast. It was awesome!"

Hermione narrowed her eyes, "you have a test tomorrow George, and you Fred, and, well, nearly all of you!" She gestured to the remaining Gryffindors in the common room. The twins looked at each other and shrugged.

"We don't need to take tests to know how great we are," Fred replied, "Hermione, if you miss out on all this fun, you're going to miss out everything."

"She's boring," someone muttered.

Hermione's eyes flashed. "Excuse me?" She snapped, wheeling around to look at whoever that said it.

It was a second year boy, who glared right back. "I said, you're boring. You're Miss Goody-Two-Shoes."

Hermione gasped. "I am not. I just know what is right and what is wrong. And sneaking out when you're not supposed to is wrong."

Harry hastily got up and gently turned Hermione around before her temper got the best of her. Ron just sat there, eating Chocolate Frogs and drinking in all the drama.

Fred, who was forever ready for fun and bets, winked at George who immediately knew what his twin was thinking of.

"How about a dare then, Miss Granger?" George asked.

"Dare?" That got Hermione's attention. She wanted to prove once and for all that she wasn't boring. She was just cautious and, okay, scared of what the teachers might think of her. But definitely not boring.

"Yes, dare." Fred joined his brother and the two looked down at the bushy-haired girl. "We dare you-"

"Wait!" Hermione raised a hand, "I don't want to do anything that requires rule breaking, or causing injuries to someone, or something that involves teachers."

The twins looked at each other again. "Okay then. We dare you to… commit the seven sins."

"Huh?" Everybody was blank.

"Starting tomorrow, you'll commit each of the seven sins in a week. One sin for one day, until next Thursday. Seven sins, seven days. Should be easy for you, right Hermione?"

Fred and George cracked identical evil grins.

Hermione faltered for a moment. She didn't mind most of the seven sins, but there was one specific one which she didn't really want to do.

Lust.

Ugh.

The second year boy looked at her and raised an eyebrow, edging her on. "Go on, I'll bet ten sickles that you don't complete the dare."

That was it. "I'll do it." Hermione snapped. "Seven sins? That's easy. I'll show you all that I'm not boring!" She raged.

"Okay then, it's a deal. Just so you know, the seven sins are Sloth, Envy, Anger-"

"I know what the seven sins are!" Hermione yelled.

"-Pride, Gluttony, Lust, Greed." Finished the twins in unison.

Harry and Ron looked at each other, with expressions of surprise, worry –and of course, delight.

"Ten sickles that she follows through," Harry and Ron told the second year boy.

"Whatever," the boy grumbled, "Granger's a goody-goody; she'll fail."

"We'll see about that," Hermione gritted her teeth. "Tomorrow is when I start."