This story is a sequel to Infinity Era
Sure, it all technically started when she turned to dust suddenly. One might even say it was five years after that, when she returned in a single blip. She would argue it all started with that weird looking Zap Apple.
Fresh out of a fairly emotionally tough day in itself, Apple Bloom found a very early ripe tree of Zap Apples and (despite the usual traditions of her family) ate one in her saddened thoughts. For reasons yet unknown, the apple not only teleported her to a whole new world but imbued her body with unfathomable, silly abilities. It was probably pure luck that she landed on probably the only person in all of Queens who knows more than other humans about Equestrians.
It's only been a few hard weeks since that fateful fight in the ruins of the compound. Peter Parker is really looking forward to the School Trip to Europe, probably his only chance of getting a break from Superhero stuff and the bad memories that targeted him in his sleep. Knowing full well that attending to Apple Bloom's dilemma will destroy his vacation opportunity, and with Apple Bloom already not too eager to return home, they agree to an idea. They'll travel together on a partnered vacation, to each take a much needed break from their lives.
When One-Eyed Agents, Magical Fishbowl dudes, Elemental Giants, Nightmares and Girl problems arise-- Spider-man and Apple Bloom partner themselves up and forge a strong bond in the process.