Sometime Yesterday's album When? is a collection of songs written by lead singer and guitarist Brendon Reese. The music ranges from high energy rock to acoustic pop to self reflective ballads. Brendon is joined by lead guitarist Dakota Ryan, bassist Tyler Stockton, and brother Cameron Reese on drums. Other musicians that appear on the album include their father Kirk Reese and Sam Cleofas. The foursome met while attending Redwood High School in central California.