Kachou Ouji (The Legend of Black Heaven)
Life can crush your dreams. Oji is a middle-management drone whose only grip on sanity, in the drudgery of his corporate lifestyle, are the few shreds of hope surrounding his past life as the amazing guitarist of Black Heaven, a heavy metal band that almost made it. In his bleakest moment, the magic of performing is restored to him when a beautiful mysterious woman informs him that only his special sound can save the universe from an evil alien invasion.
HARD ROCK SAVES SPACE!?