Listen to Fullmetal Alchemist: Brotherhood Opening 4 - Period online. Fullmetal Alchemist: Brotherhood Opening 4 - Period is an English language song and is sung by Rap AR Anime. Fullmetal Alchemist: Brotherhood Opening 4 - Period, from the album Anime, was released in the year 2020. The duration of the song is 3:33. Download English songs online from JioSaavn.