Melody Day return with their music video for “Speed Up” and it features Junior (Jr.) of GOT7. 1theK states, “Girl group “MelodyDay”, with amazing talent and style, returns with [SPEED UP], filled with upgraded melodies and sounds. If MelodyDay boasted a “bright & bubbly 20s” look in the past album, in the latest [SPEED UP] album, the girls will enchant…