While competing on a reality show, idols Hyun Jae (Sae Byeol) and Soo An (Seo Yi Han) forge a close bond. However, only Hyun Jae makes it to the finals and debuts, forcing them to separate despite their mutual attraction. Years later, a project reunites them, but it's not the happy reunion they hoped for. Now more established in the entertainment industry, openly expressing their feelings might be even riskier than before. Meanwhile, Jae Min (Lee Woo Jin), trying to rebuild his image after a scandal, and Khun (Petch Panutuch Saelee), a Thai man who arrives in Korea seeking a fresh start, share their struggles and must also confront the fact that they may not be able to fully express their feelings. This is the third season of the series "Love Lesson."