Texas outfielder Bella Dayton screams in celebration after scoring a run. (Nathan J Fish/USA TODAY NETWORK)

Texas softball scored a wild comeback win over Oklahoma State in the Women’s College World Series semifinals to advance to the championship series in Oklahoma City.

The unseeded Longhorns blanked the seventh-seeded Cowgirls 5-0 in the first semifinal matchup to force a winner-take-all contest, but then they fell behind 5-0 in the first three innings of the deciding game.

Oklahoma State starting pitcher Kelly Maxwell found a groove early, pitching a no-hitter until the top of the fourth, when Courtney Day got Texas on the board with a three-run home run.

One inning later, a single by Texas sophomore Bella Dayton stepped two the plate with two on and one out. She sent a single into the outfield, where it was fumbled by the Oklahoma State right fielder, allowing one runner to score.

Then Oklahoma State first baseman Hayley Busby attempt to throw out the runner at second went wide, resulting in two more runs scored. Suddenly, Texas held a 6-5 lead, one it held for the rest of the game.

The Longhorns are making their first trip to the WCWS finals, and they become the first unseeded team to do so.

“No one thought we’d be here but we proved everyone wrong,” Longhorns starting pitcher Estelle Czech said. Hailey Dolcini was brought in to relieve her in the third inning.

On the flip side, Monday’s late game represented Oklahoma State’s largest blown lead of the season.

“To make three errors was tough to watch and tough to take,” Oklahoma State coach Kenny Gajewski said. “We were trying to win. We just didn’t make the plays.”

Texas advances to play No. 1 seed Oklahoma starting Wednesday night. The Longhorns are coming off of a 7-2 loss to the Sooners in the WCWS on Saturday, but they did hand the Sooners their first loss of the season back in April.