On 4 November 2014, Lee was drafted first overall by Seoul WFC.[1] She finished the 2015 season with six goals and two assists in 18 appearances.[citation needed] The following season, she scored nine goals and registered four assists in 18 appearances.[citation needed] In her final season with Seoul, Lee scored eleven goals and had six assists in 21 appearances.[citation needed]
Gyeongju KHNP
In 2018, Lee joined Gyeongju KHNP.[2] On 23 April 2018, she made her debut in a 0–0 draw with Incheon Hyundai Steel Red Angels.[3] On 14 May 2018, she scored twice in a 3–0 away victory against Changnyeong WFC.[4] In her final game for Gyeongju KHNP, Lee scored a hat-trick as her team won 3–0 away at Boeun Sangmu, having previously scored two goals in the previous match, her last at home, a 5–2 win over Suwon UDC.[5]
Manchester City
On 7 August 2019, Manchester City announced they had signed Lee on a two-year contract. Lee made her WSL debut for Manchester City on 7 September 2019 coming on as a second-half substitute against Manchester United at the Etihad. The match broke the record attendance for a WSL match at 31,213.[6] Lee made her UEFA Women's Champions League debut and first City start in a 7–1 away win at Swiss team FF Lugano 1976 on 12 September 2019.[7] Lee scored her first goal for Manchester City on 12 October 2019, coming on as a late substitute at home to Birmingham City to seal a 3–0 victory for City.[8]
Loan to Brighton & Hove Albion
On 24 July 2020 it was announced Lee had joined WSL team Brighton & Hove Albion on loan for the 2020–21 season with head coach Hope Powell describing the signing as "a real coup."[9] Lee made her debut for Brighton in the season opener, a 2–0 home win against Birmingham on Sept 6 2020.
Lee made her FA Cup debut on September 27, 2020, starting in Brighton's Quarter-Final also against Birmingham City.[10]
On 7 February 2021 Lee was part of the Brighton team that ended Chelsea's 33-match unbeaten run with a 2–1 victory for the Seagulls.[11] Her first goal for Brighton, a header, came in the Away fixture at Reading on 2 May 2021. Her second, a spectacular long-range hit, coming just 35 seconds later when she intercepted the ball from Reading's kick-off. It was described as an immediate contender for WSL goal of the season.[12] Lee then went on to score in Brighton's next fixture, an end-of-season game at home to Bristol.[13]
Brighton & Hove Albion
Lee transferred permanently to Brighton from Manchester City in August 2021.[14] She scored for Albion in their 2021–22 season opener against West Ham United on 5 September 2021.[15] It was her fourth goal in her last three WSL games, including the final two matches of the previous season.[16]