Bang Brave Bang Bravern

The island of Oahu, Hawaii, serves as a battleground for troops from various countries, including Ao Isami of the Japan Ground Self-Defense Force and Lewis Smith of the United States Marine Corps. Both Isami and Smith are skilled in combat, often using humanoid armored weapons called "Titatonostrider" or "TS" for short. Their teams are ambushed by an unknown enemy, forcing Isami and Smith to fight for survival alongside scattered soldiers.