This concerto deviates from the styles of his previous concertos and has some features that differentiate the music from his earlier works. In most classical concertos, it is the orchestra that introduces the opening theme and the soloist begins to appear a few minutes later. However, it is the piano solo that introduces the opening theme and the orchestra responds shortly thereafter. The second movement, which has clearly contrasting characters from the first and third movements, is a form of intermezzo that connects to the third movement. Due to the great deal of weight placed to the orchestra, this grand scale concerto brings up the images of symphonic works. 
  
The lyrical first movement begins with the quiet introduction by piano solo, as mentioned earlier. The orchestra takes it over and continues to develop the piece by lively performance of violins and the recurrence of themes by oboe and other woodwind instruments. The somewhat poetic and deeply contemplative second movement displays clear contrasts between piano and orchestra. It is a short movement that consists of dialogue between piano and strings. The piano evokes sadness and has beautiful melodies. It also expresses piano’s unique color in addition to its techniques. The traditional rondo third movement is lively, rhythmic, and cheerful. The bright first theme of the strings is repeated by piano variation. The piano solo displays various aspects of its ability and the movement ends with liveliness.

Jaejoon Ryu dedicated his “Sinfonia da Requiem” to the late president of Hyundai Group, Jooyung Jung, and Korea’s past generations, who made serious efforts to develop and improve the country during the 20th century.   

The composer believed the Korean nation we have today is the result of their unending efforts, but that their achievements have easily been forgotten while people enjoy themselves with the environment these heroes helped create. This requiem serves to commemorate and remember their achievements.

The requiem works by many renowned composers are usually about death (It has sometimes been used as funeral music) or expressions about an abstract concept of death.  But Jaejoon Ryu’s requiem is special in regards to its focus on the history of the nation.

This requiem is in four movements: ‘Requiem aeternam’, ‘Dies Irae’, ‘Offertorio’, ‘Sanctus’.  The sonata-form first movement introduces the beginning theme, which gradually rises and adds more tension.  The theme is a central figure and is repeated throughout the entire movement as modified figures.  The second theme is performed by a wind ensemble to describe a pastoral atmosphere.
The second movement’s main theme, on the other hand, is dominated by soprano and is not directly heard.  It appears as an organic connection between the occurrences a counterpoint activity and a harmonic eruption.  The coda of the movement is the inversion of the coda of the first movement.