"Winter Sonata" is a popular South Korean television drama that first aired in 2002. The series follows the love story of Joon-sang and Yoo-jin, who are childhood friends that reunite after many years. Their relationship is complicated by misunderstandings and the presence of Soo-yeon, who has her own feelings for Joon-sang. The drama is known for its beautiful cinematography and emotional storytelling, which contributed to the Hallyu wave, or Korean Wave, spreading across Asia and beyond. It has received numerous awards and remains a beloved classic among fans of K-drama.