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Synopsis

Oji Tanaka leads an ordinary life in Tokyo as a husband, father, and salaryman, yet beneath that routine is a history as the former frontman of a short-lived heavy metal group called Black Heaven, where he performed under the name "Gabriel." His settled existence is disrupted when Layla, a mysterious blonde woman, appears and urges him to retrieve his Gibson Flying V and perform once more. Unaware that his playing carries extraordinary consequences, Oji discovers that the sound he produces serves as an energy source for a colossal weapon involved in a war between worlds. The story follows his reluctant return to music and the unforeseen link between his past fame and a conflict that extends far beyond his ordinary life.