Actors Song Kang, Lee Jun Young, and Jang Gyuri are collaborating on the upcoming drama 'Four Hands, Two Sonatas,' in which they portray characters connected through music and friendship. The project features behind-the-scenes footage, promotional teasers, and posters highlighting their on-screen chemistry and musical performances. Jang Gyuri plays a warm-hearted violist, while the cast shares insights into their roles and the nostalgic atmosphere of the series.