ISUジュニアグランプリファイナル
Competing in the 2014–15 JGP series, Lee won gold at his first event, JGP France, with overall score of 203.81. This accomplishment made him the first South Korean male figure skater to win an ISU event. By obtaining bronze at JGP Croatia, he became the first Korean male skater to qualify for an ISU Junior Grand Prix Final. In December, at the ISU Junior Grand Prix Final in Barcelona, Spain, he placed fifth in the short program and sixth in the free skating to place sixth place overall.