In Goodbye Everyone Siinamota Seriously Questions His State Of Mind And Level Of Maturity And How He Feels His Childhood Has Been Taken Away From Him. The Song Has An Upbeat Melody With The Vocal Synth GUMI Contributing Primary Vocals And Siinamota Serving As The Composer Tuner And Backup Vocalist. The Upbeat Melody Stands Out In Siinamota's Discography Serving As An Opposite To The Depressing Lyrics.