Accompanied by a vibrant second part, the first part sings a catchy melody (the 'La-Sol' motif should be memorable). Since this melody is divided between the left and right hands, it should be played so that it connects smoothly. Furthermore, by always being mindful of the harmonic progression of the second part and the sixteenth-note rhythm, the duet performance will become more enjoyable. In compositions of this style, the sound can vary significantly depending on the use of the pedal (timing, depth, duration, etc.). Please try various methods to find the sound that matches your interpretation. The title was borrowed from Yosui Inoue's 'Isso Serenade', but there is no particular relationship between it and this composition.