Week without underwear.

On monday Hermione wakes up sooner as usual. Buzzing and yellow light caught her attention.She reached after the book and opened it.

_Congratulations you successfully completed your first assignment. We hope it was as good as we think it was. For the next one. Starting today you will not be wearing any underwear for the whole week. And each day, your skirt will shorten itself by a few centimeters. _Don't worry it will still cover you, mostly. Enjoy it.

With bad feeling Hermione opened her drawer. As she feered all her bras and panties were gone. Then she remembered how good she felt after her first assignment. So she decided to follow. After she dressed, she looked into the mirror. So far no one can tell she is not wearing her underwear. So the only thing that worried her was how much the skirt would shorten through the week.

Luckily for her she managed to go the whole week without an accident. Hermione even started to like it. When in class she adjusted her skirt in a way that she was sitting on her bare bottom. Contact of her skin with wooden chairs sends shivers through her spine. On Saturday during an especially boring History lesson. Her hand found its way under her skirt.

Without thinking she opened her legs for better access. As a result her skirt momentarily reaching to the middle of her tights. Moved even higher. If anyone was looking at her. Could easily see the side of her butt. Maybe even her pussy.

But everyone in the class was so bored with the lecture that almost everyone was sleeping. Hermione took advantage of it and started massaging her private parts. She bit her lips when the first wave of pleasure washed over her. Next moan was a little louder, she covered her mouth with her other hand. She froze and started looking around if someone heard it.

Luckily for her everyone was still sleeping. However she didn't have the opportunity to finish herself. Bell announced the end of the lesson. She waited for everyone to leave.

When she stood up, the front part of her skirt descended over her tights. However on the back it was rolled up. So her butt was visible to all. If someone was standing behind her.

Hermione takes a few steps. She realized that she liked the feeling. Walking with bare butt. In the hall she looked both ways, most of the students were gone. She turned to the left and started walking. Without covering her butt. Possibility to be discovered like this. Make her a little excited. With every step her buttcheek flexed.

When she reached the end of the hall she turned around. Which saved her. Because right in that moment few slytherin students come from over the corner. Seconds sunner and they would see her bare behind. This close encounter was on Hermione's mind when she masturbated that night

Friday morning arrived and Hermione woke up a little worried. Today her skirt would be shortest than ever. White shaky hands she put it on.

“Gods,” she gasped.

It wasn't a skirt but a mini skirt. It ended right where her buttcheeks endes and her tights started. Hermione make fev steps around the bedroom. To test how the skirt will react to movement. If she would move calmly there was no danger. But if she moves more dynamically. There was a possibility that the skirt would not cover her.

First test for her was to descend from the bedroom to the Gryffindor common room. Every step she took down the stairs moved her skirt slightly up and down.

“Here you are, ready?” called her Ginny when Hermione reached the common room.

“Ready?” Asked Hermione.

“For Hogsmead, you promised to go with me and Luna. Lets go.” Ginny took her hand and led her through the portrait outside.

Then with a fast pace she literally dragged her through a castle. Ginny knows that in her short skirt, any fast movement will be hell for Hermione. She would not be able to cover properly. Not like she will be flashing her bare butt and pussy for everyone. But an occasional slip could happen. And some students could be lucky enough to see some glimpses.

Hermione didn't look where Ginny was leading her. Her biggest priority now was to keep her skirt from revealing too much. Which wasn't easy to do with one hand. Between covering her back and front. Hermione decided for her pussy. So she held the front of her skirt as low as possible.

Unfortunately this made the back of her skirt go a little higher. Hermione was pretty sure she was flashing her bare butt for everyone they ran around. Which started to have an effect on her. She was blushing furiously and her pussy started to feel wet.

Occasionally remarks she heard from students they passed didn't help either.

“Did you see that, I could swear that Gryffindor chick isn't wearing panties.” Said one Hufflepuff student to his friends. As they pass them on stairs. But before they could see more Ginny and Hermione vanished behind the corner.

“Gryffindor slut.” Hissed one Slytherin, they pass next to the great hall. Hermione looked over her shoulder and their eyes met. But she couldn't tell if the Slytherin girl approved of her attire or otherwise. When they step outside the castle. Luna was already waiting for them.

“Nice skirt.”she said instead of greeating. Ginny smirked, still holding Hermione`s hand.

“Thanks.” Hermione said not knoving how to take this compliment. She blushed even more. Luna as Ginny took Hermione's hand and together they ruched to the Hogsmead.