Things ramped up after graduation when the couple moved to Boston in the summer of 2020 so Ms. Liu could begin law school at Harvard. When she wasn’t studying, she and Mr. Sun spent the first years of the pandemic bonding in their studio apartment. They passed the time eating ice cream, a shared favorite dessert, and watching travel YouTubers “talking about the adventures we also wanted to go on together,” Mr. Sun said.

Over the next few years, the lifelong travel fans made good on their dream, completing adventures across six continents, including the “bucket list experience,” as Mr. Sun put it, of hiking the Inca Trail to Machu Picchu in 2022. A year later, on a trip to Portugal to celebrate his birthday and Ms. Liu’s final semester of law school, Mr. Sun proposed.

Mr. Sun, who grew up in the Dallas suburbs, has a bachelor’s degree in mathematics and in business administration in business honors and quantitative finance from the McCombs School of Business at the University of Texas at Austin. He currently works remotely as an engagement manager at the consulting firm Monevate, which is based in Saratoga Springs, N.Y.

Ms. Liu, who also grew up in suburban Dallas, has a bachelor’s degree in rhetoric and writing and a law degree from Harvard. She is a litigation associate in the Washington, D.C., office of Kirkland & Ellis.

When it came to a wedding location, the couple, who now live in Washington, “wanted to do something that was a bit out of the ordinary,” Mr. Sun said. At the time, they’d traveled to five continents, with plans to visit Australia the following summer. As the final continent left to cross off, Antarctica immediately came to mind, but they weren’t sure if, legally, marrying there was actually feasible.