Age Regression Diaper 3000

The warm morning sun streamed through William's apartment window, painting stripes across his bed. At 22, living in a foreign country, his days usually began with the familiar routine of preparing for work. But this morning was different.
He stretched, reaching for his phone on the side table, when a shimmering, ethereal portal materialized directly above his head. Before he could react, a nondescript package dropped from it, landing with an unceremonious thud right on his face.
"OUCH! WTF?!" William exclaimed, scrambling upright, a hand pressed to his nose. His eyes, wide with disbelief, darted towards the lingering shimmer of the portal. "Where the heck did this come from...? And what the heck was that portal?! I am certainly not dreaming, am I?"
He slapped his cheek, a sharp sting confirming his waking state. "Yup, totally not dreaming..." His gaze then fell upon the package, a note affixed to its brown paper. He picked it up, curiosity overriding his shock, and began to read: "Thank you for ordering the brand new ARD3000. Open it to read the instructions."
