It was a school drop-off made for their wildest dreams. Taylor Swift’s “Blank Space” pulsed on a stereo. Students piled out of S.U.V.s wearing Travis Kelce jerseys. Teachers donned Swiftie friendship bracelets and T-shirts with Mr. Kelce’s face.

The Kansas City area has been in a state of exuberant, shameless joy since Mr. Kelce, the star tight end of the hometown Chiefs, and Ms. Swift, the pop icon and Arrowhead Stadium regular, announced their engagement on Tuesday. And at the Barstow School in Kansas City, Mo., students and employees were invited to dress up for an impromptu spirit day to celebrate the couple’s romance.

“I think it’s very fairy tale-ish,” said Anh Griffith, who wore a Chiefs shirt on Wednesday as she dropped off her two sons, both in Chiefs jerseys.

For two football seasons now, this region has cherished being home to one of the world’s most closely watched relationships. The couple, which got together during the most dominant era in the team’s history, has given a burst of self-assured swagger to a proud city that has often felt overlooked. The collective decision has been to go unabashedly, unapologetically all in on the Kelce-Swift experience.