At a Taylor Swift Concert? Time to Propose.

The twangy guitar picking begins and the crowd cheers. It’s time for “Love Story,” the ninth song on Taylor Swift’s Eras tour set list. Onstage, Ms. Swift strums her guitar and sings a modified Romeo and Juliet story, one with a happy ending that closes with Romeo on bended knee and Juliet picking out a wedding dress.

It’s a Swift classic that has taken on a new and literal meaning during the Eras tour, where some fans have used the musical moment to underscore their own love stories with meticulously planned marriage proposals right there in the stadium while Ms. Swift performs.

Megan Voo and Justin Chong are two such fans. The couple, who live in Melbourne, Australia, and met as architecture students at the Royal Melbourne Institute of Technology in 2017, got engaged during one of Ms. Swift’s shows in their hometown earlier this year.

Ms. Voo, 26, was in complete shock when Mr. Chong, also 26, popped the question in February, mostly because she had no idea he was even at the concert in the first place. Ms. Voo attended with her sister, but, unbeknown to her, Mr. Chong had purchased a nearby seat to surprise her. (Ms. Voo’s sister was also in on the plan.)

Mr. Chong got to the concert early and made the people seated around him aware of his plan. They helped form a human shield to keep him hidden from Ms. Voo. When the moment came, they kindly stepped out of the way so he could make his way to Ms. Voo’s seat.