Kikou Sennyo Rouran

A secret occult group, Shiromorishuua, attacks Tokyo with a massive monster, prompting the Japanese peacekeeping force ASY to respond using a Gousen, a type of metal faery. The Gousen defeats the creature by forcing it into the ocean. However, an unexpected assault occurs when a glowing girl named Rouran appears and attacks with a beam of light. Rouran is unaware of her identity, background, or the reason she transforms into a vengeful angel when near Gousen or Kyoushi, which are reanimated corpses. As she grapples with these mysteries, Tetsuya observes her from Tokyo Arcadia, a community of expatriates and dissidents.