Episodes

A young woman walks into a tunnel alone at night. Suddenly strange trenchcoat-wearing figures melt out of the walls, surrounding her and chanting, ""Come to our world!"" Ayane Isuzu, a high school girl, emerges from the darkness and single-handedly defeats the creatures, saving the woman. Nearby, Miyu Manadzuru, another high schooler, avoids a pushy companion by ducking into an alley and flying into the sky. Ayane spots the flying girl in the night sky. At school the next day, Ayane is revealed to be a cynical loner, known as being into technology and labeled a weirdo. Meanwhile, an inspector looking into a car accident finds one of the trenchcoat-wearing figures in a wrecked man. The figure disappears, leaving a small crystal behind. Ayane meets with Nazo, a mysterious older man who tells her to seek out Miyu since Miyu's a Gate Keeper. Ayane also gives him a bag of crystals (what's left of the Invaders she fought) in exchange for money. That night, Ayane invites Miyu to join her so Miy || Ayane Isuzu destroys some Invaders, and collects the crystals they leave behind. While looking for more Invaders, she sees a girl fly across the sky. After school the next day, Ayane meets with a mysterious man who tells her to locate a girl called Miu Manazuru, for she is a Gate Keeper. Ayane gives the man a bag of crystals in exchange for money. That night, Ayane approaches Miu, and tells Miu to join her in her effort to destroy the Invaders. Miu is wondering what to do, when they are suddenly surrounded by Invaders... Source: Wiki

Satoka meets a new student in class. Outside, Ayane wistfully watches some birds. Later, outside the school, Miu asks Ayane about Satoka and Satoka's powers. Suddenly, Satoka appears and reveals that Ayane is the only daughter of legendary Invader-hunter Shun Ukiya. Satoka asks why Ayane took her mother's maiden name, given her dad's achievements. Ayane slips away without answering, angering Satoka. Count Akuma Hakushaku, an Invader, tells the blonde ghost girl his strategy of luring victims with the smell of honey and then poisoning them. Satoka fruitlessly tries to find out about Ayane from Miu. After Satoka leaves, Yukino appears to Miu and quotes more cryptic poetry. Ayane visits Miu at her place of work and criticizes her for putting up a false, friendly front when she's actually being selfish. Reiji picks up Invader activity, and Satoka races to its location. Satoka slaughters the Invaders using her Gate of Blades. It looks like she's all done by the time Ayane arrives. Excited b || Miu`s school friends notice that Miu seems distant depressed. Miu`s friends decide to take her to a karaoke lounge to try to cheer her up. They are in a singing room when an interruption occurs in the form of a power outage. Suddenly, Invaders start swarming all over the place. Ayane hears about the Invaders at the karaoke lounge, and goes to help. Source: Wiki

As school lets out, Miu's friends invite her out, but she leaves them and visits Reiji and Ayane at Headquarters. Reiji has been taking care of Ayane, who's been in a coma for four weeks. Reiji talks about how Ayane hated the city, and how the city's corruption breeds Invaders. He shows Miu the storeroom of crystals from vanquished Invaders. He says that one day he hopes to be able to turn these crystals back into humans, even though the chances are slim. He also wonders why, despite her hate, Ayane continued to bring the crystals back to him instead of destroying them. The blonde-haired Ghost Girl enters Headquarters and hovers over Ayane. She says Ayane is just like her. Reiji opens his Black Gate on her, but she isn't absorbed. He realizes she isn't an original Invader, but a human. Using her own Gate powers, the Ghost Girl blasts Headquarters apart, takes back all the collected crystals, and disappears. Reiji reveals that he's partly prosthetic because his use of Gate Powers consum || A new Gate Keeper, Satoka Tachikawa, has appeared. She destroys Invaders to collect their crystal remnants for money. Ayane and Miu are outside of school when Satoka confronts them. She attempts to get Ayane to answer a question about her past, but Ayane manages to slip away. Later, Reiji notices signs of Invader activity, and Satoka rushes off to fight them. Source: Wiki