From Wikimedia Commons, the free media repository
English: A rock opera is a work of rock music that presents a storyline told over multiple parts, songs or sections in the manner of opera. A rock opera differs from a conventional rock album, which usually includes songs that are not unified by a common theme or narrative. More recent developments include metal opera and rap opera (sometimes also called hip-hopera). A rock opera tells a coherent story, and may involve songs performed as if sung by separate characters in a drama, as in classical opera.