"How about a wedgie?" asks Ginny, stepping towards Hermione. "No, I don't want that." quickly replies Hermione. "Let me rephrase? I'm going to give you a wedgie, your going to let me." Hermione took a step forward and looked to Ginny. "That's a good girl." said Ginny, pulling down Hermione's skinny jeans, revealing a dark gold thong with lipstick on the front. "These are cute." said Ginny, playfully pulling on the golden undies.  "Too bad they're gonna be destroyed." and with that, she yanked up hard on the back of Hermione's thong, making her squeal and jump. Ginny just giggled and pulled harder. "These are pretty tough Hermione. I think they need to be stretched some more." and she lifted them up and up until she got an atomic on Ms. Granger. Then she began to tug harder and harder on the front of the thong until she heard a popping sound coming from behind Hermione. "Oh good! Look Hermione, they're ripping! Almost done!" Ginny said Excitedly, beginning to pull very hard on the front as the popping got worse and worse. Eventually they snapped and Hermione let out a big sigh. "Alright! On to business then." Hermione looked to Ginny, who was at Hermione's bed, and getting her wand out. Hermione walked over, rubbing her bottom and said: "Thanks Ginny, that was my only thong!" "That's a shame isn't it?" said Ginny teasingly. "But, for right now, we need to change your panties and make some rules OK?" Hermione slowly said: "OK...." and walked over to Ginny, who had magically pulled out all of Hermione's panties. She waved her wand a few more times, and all of her panties changed to be pink, and all read either spank me or wedgie me. "You have to wear one of these pairs of panties at all times, and at least once a day, you have to pee yourself, in front of me." "But I don't have enough panties or pants for that!" Ginny answered by duplicating all the skinny jeans and panties that Hermione had. "Now, for some rules. When we are alone, you will call me mistress, and every time you see me alone and no one else is around, you must come up to me and ask me to spank and wedgie you. Also when you leave the dorm, you must have at least 3 inches of your panties showing. If your wearing a long winter coat or anything that covers your waist, you will have a bra connection in. Also, whenever you get the chance you must go out and purchase: a paddle, ruler, and a few cans of whipped cream. I think that covers anything, so now we're going to have some fun shall we? Put on a pair of panties and we'll go to the room of requirement." Hermione did as told and also put her skinny jeans back on. Hermione met Ginny at the entrance to the room of requirement. "You first slave." said Ginny, opening the door. "Yes mistress." said Hermione, clearly annoyed. They both stepped in to an empty room, except for a few various hooks around the room. Hermione was about to turn around when she felt her pink panties shoot up her bottom up to her neck. Hermione let out a squeal of pain as the fabric shot up her bottom. "Oh don't go whining so fast Hermione! You're my slave forever, so get used to this!" Hermione cried a little bit as she realized that she hadn't actually specified how long Ginny would be her mistress. Ginny finished Hermione's first wedgie with an atomic. Ginny let go of Hermione's panties and watched her struggle to get the panties off of her forehead. Then Ginny was by her side again, and she gave Hermione a squeaky clean, then a hard pull to the front of her panties. She let go and looked at Hermione, wondering what to do next. "Come here." Ginny finally said. "Hermione, we're going to do a little bit of role playing ok? Which situation do you want to do?"