Amazingly, in August, Ryu won her very first KLPGA event after moving up! The Samdasoo Masters had several LPGA stars in the field, but it didn't matter, as the 18-year-old beat them all! She would go on to earn 100 million won in limited action the rest of the season, on top of the 160 million she earned for the win.

In 2020, the Covid pandemic wreaked havoc the world over. The KLPGA canceled several months of tournaments, but finally, Ryu was able to start her rookie year in mid-May. She had a fantastic debut year. She earned over 628 million won, second on the money list behind only Hyo Joo Kim, who normally played the LPGA but stayed in Korea all year due to Covid. She destroyed the competition for Rookie of the Year, finished 6th in scoring average and 6th in Player of the Year. She also claimed a win, successfully defending her title at the Samdasoo despite the presence of superstars like So Yeon Ryu (no relation!), Inbee Park, Hyo Joo Kim and world #1 Jin Young Ko. Besides the win, she achieved 8 other top tens, including three runner-up results and one third.

Hae Ran also played in the annual LPGA/KLPGA team event. Teamed with fellow long hitter A Lim Kim, she beat the formidable team of Jeongeun Lee6 and Jiyai Shin one up. In singles, she crushed MJ Hur 4 & 3. The KLPGA won the title 10.5 to 7.5, with Hae Ran claiming the MVP for the KLPGA squad.

At the end of 2020, Ryu played at the US Women's Open, which had been delayed six months due to the pandemic. She did marvelously, notching a tie for 13th finish.

Hae Ran's second year in 2021 was almost as strong as her first. She finished 5th on the money list with more than 795 million won earned. She grabbed two wins: the Elcru TV Chosun Celebrity event and the final event of the year, the SK Telecom Championship. She also had a runner up result, a third, and 10 total top tens. She also collected a t-7th finish at the annual LPGA event in Korea, the BMW Championship.

Hae Ran continued her excellence on the KLPGA in 2022. She made nearly 830 million won during the season, 4th on the money list. She was second in Player of the Year points and second in scoring average with a 70.57 stroke average. She managed an incredible 17 top tens, which included one win, a second, four thirds and three fourths.

Hae Ran also played in the US Women's Open, but missed the cut. But she announced that she was going to try out for the LPGA tour, and thus attended LPGA Q-Series at the end of the year. After a slow start, she gradually gained speed, and to the surprise of no one, she finished in first place, earning full status for the tour in 2023. It will be great to see this strong player join Hye Jin Choi on the LPGA!

2023 was in fact a fantastic year for Hae Ran. She quickly took over the lead in the Rookie of the Year race and, despite several rookies winning events during the year, maintained it. She contended at the Founders Cup and the Mizuho Open, then at the US Women's Open at Pebble Beach, eventually finishing solo 8th, her career best Major result. She finally got her sole win on tour in late September in Arkansas. She started the week with back-to-back 64s and cruised to a win.

Hae Ran won the LPGA Rookie of the Year award, the first Korean to do this since Jeongeun Lee6 in 2019. She gave her speech in English, just like Lee6 had done. She won $1.555 million dollars, 15th on the money list, moving to category 1 status for 2024. She finished the year ranked 30th in the world. All in all a wonderful season for the young star.