Setsuna, known as Gavan Bushido, the Space Sheriff Gavan of MultiEarth Λ8018, confronts Reiji, who has fused with Gavan—a being that shouldn't exist in two forms... To silence the arrested Hitoshi Kuzumi, the crime syndicate's boss, Karasumaro, attacks Setsuna and his team. As one incident follows another, Setsuna sees Reiji burning with rage toward Karasumaro and...!