J-Pop in B♭ major

The task

Compose a J-pop instrumental in Bb major, 148 BPM allegro, 4/4, about 88 bars and about three and a half minutes, scored for bright piano, clean guitar, bass, strings and drums in 5 voices. Texture: driving eighth-note piano with the chorus melody lifted. Open with 8 bars of bright piano alone, then layer the other…