What did they do wrong

What did they do wrong? Nothing. Four innocent friends; transfer students from abroad, each girl staying with a different family for the duration of a year.

Certainly no ulterior motives, other than the hackneyed 'learning to speak Japanese better', and certainly no plans dealing with the science of biological-engineering; that plan was forcibly shoved unwelcomingly into the group's schedule one warm Saturday morning.

While standing about 100 meters away from the museum in which they were touring, on a sunny cobblestone path, the foursome were blissfully unaware of the 'destiny' that a cocky 16-year-old boy was about to bestow (more like ram down) upon them. Now everything would be wrong with them.

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As the girls congregated around a soda vending machine, one of them pointed out an adorable pink café with a delighted squeal.

The clock in the square struck twelve. The flower-shaped embellishment on the façade of the restaurant opened, revealing a tranquilizer-like gun containing five syringes full of strange liquid… and four others lodged unseen behind them.

However, the girls didn't see this, so they continued to sip their drinks while observing a group of 5 bickering girls with peculiar hair pigments.

Suddenly, the ground began to tremor violently. Their sodas sloshed onto the stone as the four braced themselves on the nearest stable object. The earthquake lasted only for a few moments, but the oddity was far from over.

Just as the shaking subsided, an unearthly light surrounded the four from below. It engulfed each individual, until they were unable to see each other.

Then everything went black.

"My ass is killing me." The long-haired brunette sat up slowly.

It was twilight now. All four were on the ground just where they had blacked out.

"God knows how no one found us. We've probably been here for a few hours." The raven-haired girl flipped a loose strand of her hair over her shoulder.

"Taffy… What the hell…"

The tallest of the bunch pointed to the brunette, gaping at the irony before her.

Two large bat-like wings sprouted from Taffy's bare scapula, of which had been covered before by a shirt. Now she was wearing a black leather tube-dress, which ended at the upper half of her thigh. The rest of her thigh was occupied by a black garter laced in red, and her lower legs were clad in black leather boots that reached slightly above her knee caps. Also donning fishnet gloves, a puffy garter on each of her arms, a collar, and two large animal ears, it looked as if she had been kidnapped by playboy mansion.

The others found themselves wearing similar strange (and slightly erotic) outfits, as well as animal parts growing out of their bodies.

Tofu, whose once blonde hair was now nearly white, had to large, fluffy, white wolf ears protruding from her head as well as a fuzzy white tail.

Cocoa (whose black hair was now a chocolate brown, to her dismay) sported a long silky tail, as well as somewhat rounded ears.

Rambutan was most likely the strangest, as from her now almost red hair, a cobra hood grew. A large scaly tail was now on her backside.

"Are we in Harajuku" or something?!"

"WTF, WTF, WTF!!"

Now was a most appropriate time to have a spasm.

Rambutan is a tropical fruit which skin is red and has thick hair-like spikes protruding from it.

Harajuku is a shopping district in Tokyo famous for their large population of cosplayers

She is saying 'WTF' like: (double-you-tee-eff)