Stepping outside the garage, you suddenly notice your hometown looks totally different. You see a pretty mountain on the horizon, wooden buildings, vibrant flowers around the roads, and what looks like a temple with an inverted V-shaped roof. You kinda feel like the town looks prettier like this, but you know full well this isn't your hometown. Hell, it's not like anywhere in your home country.
Just to hammer home that this is somewhere you're not used to, you see a middle-aged Asian man walking down the street. He notices you staring at him, and assuming you're a little girl looking for attention or something, he turns, smiles at you and says, 'Sugoi!' You smile back, but as he walks away your eyes narrow. Either that guy's very invested in his home's culture, or...
You try to run for home, and for a moment you have no idea which way to go. But then you get an idea in your head somehow, and sort of let your legs and your memory carry you. Eventually, you arrive home, fortunately not being spotted by any of your family, and rush to your room.
While you're obviously confused where the fuck you are, before you can try to look on your PC for that or anything, you notice your reflection looks different. Your skin tone is noticeably different, and your eyes are suddenly a deep brown. You look like an Asian teen all of a sudden, and weirdly, very androgynous with shoulder-length hair. Is... is this because of the yukata?!
Barricading your door with some books, you go to the mirror, pull off your sandals and undo the obi before slipping off the yukata. Reaching for the bag with your old clothes in it to get back into those, you suddenly feel a weird twinge run through you. You suddenly feel kinda horny, like seeing your new body almost naked distracted you. Great timing, you think to yourself.
But you soon realize it isn't just that. A strange shiver surrounds your chest and crotch, and you slowly realize your body hasn't finished changing. Your nipples perk up and turn erect, and start to grow, rapidly turning more sensitive. Breathing heavily, you watch your nipples and areolae get bigger before your eyes. A few moments later, they poke out from your chest, and when you rub them experimentally, you gasp with pleasure. Fantasies fill your head of having them rubbed and sucked on, and as your breast flesh gradually forms you wish someone would cup and play with them.
You pull off your underwear to see your crotch as that starts to feel weird just like your chest, but the way it changes is almost the opposite. Your balls are tugged inside you, and a passage seems to form in their path. You soon realize you're forming a vagina. Meanwhile your cock seems to rapidly shrink, its sensitiveness rapidly increasing as its nerves concentrate around a tiny nub rather than being spread through a large shaft. Your scrotum also tucks inwards to form your pussy lips, and you feel an intense relief from pressure as your cock finishes receding into a clit and your vaginal slit opens out.
Once the weird high of your changes finishes, you look at your new body in confusion, simultaneously scared, confused and weirdly happy. Staring at yourself, you wonder what to do now.