Young Harlock wo Oe! Cosmo Warrior Zero Gaiden

Synopsis (en anglais)

Pirates have kidnapped Zero in an attempt to finally defeat the notorious Captain Harlock. Harlock is bound by a promise to his friend Toshiro to protect his lab on a strange mushroom planet. Fates collide as Zero, Harlock, Sylviana and the pirate Hunter all pursue their own agendas during one decisive battle. (Source: Anime News Network)