I'd chosen the house pretty much at random. The street wasn't too far from the station and I just liked the house number (24). Also it looked like the sort of house that probably had a spare room (as it turns out it did) and that's all I really needed; somewhere to stay for a couple of days. That being said I wouldn't pass up the opportunity to have a bit of fun with the inhabitants of the house.
I rang the doorbell. There was a pause, the sound of footsteps and then a man opened the door. Once I had convinced him that we were long-time friends that hadn't seen each other in a while he was all too happy to let me in and put the kettle on as we caught up with what we'd been doing the past few years. I learned that he was a freelance graphic designer called Francis who lived here with his fiancée Grace, who was currently at work. He learned that he felt very guilty about not knowing anything about me despite our friendship, but also that he would never ask about it. He also learned that, from now on, he and Grace would be sleeping in the spare room.
It was a while later now, and I had paused the television to check up on Francis, who was in the process of moving some of his and Grace's belongings to the spare room. Francis was neatly folding a pair of Grace's leggings, which gave me an idea. I asked him whose leggings they were. He told me that they were Grace's, wary that this might be some sort of trick question, and explained they wouldn't even fit him, holding them up to his waist to demonstrate the point. While Francis wasn't out of shape by any means he certainly wasn't in any position to fit into his girlfriend's trousers, at least not yet. I smiled slightly, and told him that they were his leggings, he'd just let himself go recently, and needed to go on a diet until he could fit into them again. Until then he'd just have to go without trousers altogether.
Francis was in his boxers before I could finish talking. I pointed at them, those aren't yours either, I think you'd be much more comfortable in your own underwear, and handed him the frilliest panties I could find. As he changed into them I explained which clothes were now his and that he shared most of them with Grace. His penis looked so snug in that tight ornamental undergarment, so much so that I decided I'd much rather watch him work than watch the television. I was also kind enough to show him the correct way to pick things up, and soon enough he was bending over at the waist to pick up each and every item of clothing individually.
He was almost done by the time Grace arrived back home, and once I'd explained all the new arrangements to her he had finished. I decided to take the opportunity to make some more changes. It seemed an awful waste to have all of those mens' trousers and pants and no-one to wear them, so I let Grace use them. Since most of the trousers were too long, I gave her a kitchen knife and the task of cutting them down to size. When I left her she was bottomless, on her hands and knees single-mindedly sawing away at a pair of jeans, making deep gashes in the hardwood floor.
By this point it was close to dinner time, so I searched through the kitchen cupboards. There was plenty of suitable food for me, but nothing for Francis now that he was on his new diet. To deal with this issue, I convened a meeting with everyone in the living room. Grace stood there, wearing her smart casual work blouse and a pair of raggedly-cut baggy jeans held up by a belt, with Francis beside her with his shirt, panties and a gormless facial expression. I told Grace that she didn't wear a belt, and would have to go on a special diet to fit into her trousers. By the time I'd finished talking, she'd slipped off her belt and her trousers and boxers had slipped to the floor, leaving her pussy exposed and eliciting a slight twitch from Francis' exposed cock. She started to say sorry until I helpfully informed her that the best way to apologise is to simply say "you're welcome" or just wink. I then sent her off to the shops to buy a variety of vegetables and other healthy foods for her fiancé and something fattening for herself. She headed out holding up her newly-tailored trousers with one hand. Then absent-mindedly dropping them when she went to unbolt and unlatch the door at the same time. She turned around, embarrassed, looking me directly in the eyes and winking before pulling them back up again and heading to the supermarket.
Feeling peckish, I reheated some leftovers. I was about halfway through when I heard Francis talking to someone in the other room. It soon became clear he was on the phone with a client, and I decided to take it off him and talk to her myself. I learned that she worked for some boring mid-sized marketing company, who had hired Francis as a graphic designer, and she learned that the only graphics she was interested in getting from Francis were sexy pictures and videos. She was obsessed with seeing him in his cute little panties and so excited to witness his weight loss journey, even if it meant misappropriating company funds to pay for videos of Francis jerking off. I informed Francis of the nature of his job, and he dutifully filmed a video of himself humping a pillow to send in lieu of the graphics he had been commissioned for. By the time he had ruined a perfectly good pillow and pair of panties with an impressive amount of semen, Grace had arrived back and was stocking the fridge with various vegetables.