Cinderella's Carriage

Origins
What people fail to realize is that the original Homecoming Dance that high school students will flutter and flitter about during the fall season actually originated with the biggest and most well-known dance in classic literature - Cinderella's Ball. Now, while the original Cinderella was not quite the same story that the modern world is familiar with, it is true that the young girl went to her Prince's ball in a carriage built for a queen. The vehicle is a pearly white with golden and silver trimming, and yes, before one asks, it does look vaguely like a pumpkin.

Effects
An innocently mischievous artifact, whenever a lonely heart walks by it, its doors swing open, beckoning the person to step inside into its plush and exquisite interior. If the person does go inside, the carriage escorts them (forcibly, if need be), to an alternate reality where they're the honored guest at a ball. There, they will spend the reality's evening with their ideal love interest until the stroke of the reality's midnight. As soon as the clock strikes (and it is seemingly always just before the two can kiss), the person is forced back into the carriage and transported back to their reality, hours after they left.

The expression 'Falling head over heels' is suspected to have originated from this artifact, since the affected will spend the next few days after the ball being depressed about losing their love, the depression ultimately accumulating to attempts at suicide by jumping off a high perch of some kind.