On the 6th, the first round of the KLPGA Tour 'Jeju Samdasoo Masters' was held at Teddy Valley Golf & Resort (par 72) in Seogwipo, Jeju. That day, Seo Eojin, Park Yeji, and Shin Dain all carded rounds of 6-under-par 66 to share the co-lead.

In particular, Seo drew attention by firing a spectacular shot eagle from 132 yards out on the 15th hole (par 5). Seo described the eagle, saying, "There wasn't much room behind the pin, so I aimed to land it toward the pin and then putt from there, but the ball went straight into the hole."

Meanwhile, Seo Gyolim and Kim Minsol — both born in 2006 and national team teammates who are vying for the top spot on this season's KLPGA Tour — experienced mixed fortunes on this day. The personal title race between Kim Minsol, who currently leads both the Grand Prize points standings (313 points) and the prize money rankings (984 million won) with three wins in the first half of the season, and Seo Gyolim, who sits second in both categories with two wins (310 Grand Prize points, 791 million won in prize money), is expected to shift depending on the outcome of this tournament.

On this day, Seo Gyolim showcased her exceptional putting touch, successfully converting birdie putts mostly from distances of three to six meters. She rattled off six birdies alone from the 6th through the 13th hole to briefly claim a share of the lead. However, she missed the green on the 14th hole (par 3) and subsequently failed a 1.7-meter par putt, dropping one stroke. She ultimately signed for a 5-under-par 67 with six birdies and one bogey, securing a tie for 4th place, just one stroke off the lead. Seo shared her thoughts, saying, "My shots were overall solid, and I'm satisfied to have produced good results despite the scorching heat. I want to carry this good feel into tomorrow."

In contrast, Kim Minsol had been in poor condition following her missed cut at the recent AIG Women's Open, affected by jet lag and long-distance travel. She struggled early on, recording three consecutive bogeys through the 6th hole, including back-to-back three-putts on the 3rd and 4th holes. She ultimately carded a 2-over-par 74 with two birdies and four bogeys, slipping back into a tie for 67th place. Kim expressed her frustration, saying, "My shot balance was off, so it was a tough round."

Playing in the same group, defending champion Ko Ji-won recorded a 3-over-par 75 with four birdies, three bogeys, and two double bogeys, finishing tied for 86th place.