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Wild Zero is a 1999 Japanese comedy horror film directed by Tetsuro Takeuchi. It stars Masashi Endō as Ace, a fan of the Japanese rock power trio Guitar Wolf. After assisting the group, the band's eponymous vocalist makes Ace his blood brother and gives him a whistle to blow during times of trouble. Ace later meets Tobio during a gas station robbery. The group later finds themselves in the middle of a zombie outbreak.