قسط 4: Aya Sword-Killer کے طور پر Hiroki کا سامنا کرتی ہے جبکہ Akira اور Kengo Kokuchi threats سے لڑ رہے ہیں۔

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Akira tells Kengo about the Kokuchi and Shirogane when Aya appears and forces them to watch her kendo lesson. During the lesson they meet Aya's teacher, Hiroki Tsukikage who values honor above anything else. Hiroki gives a lecture and asks Aya to train with him. Even though she's strong, Aya looses to her more experienced senpai (Hiroki). Before going home, he tells her that they'll have an Iai training (using of a real sword instead of wooden one) the next day. Later, Hiroki finds himself surrounded by the corruption of Japan's streets (like the 3 female students, hanging out and laughing/belittle him when he told them to go home or the prostitutes calling out to him), leaving him frustrated when the blue haired guy appears. The next day, news of a Sword-Killer spreads. The killer did not really kill the victims but injured them enough to bad they had to be sent to a hospital (the victims are the people whom Hiroki saw the other night). Aya, waits for Hiroki with Akira and Kengo but he doesn't show up. The 2 go home separately afterwards. Meanwhile, Mayu tries to get home, mumbling about handsome guys when the Killer appears in front of her. He states that she's wearing improper clothes and attacks her. While walking home, Aya she hears Mayu's scream and rushes to her. She sees the killer, who is about to hurt Mayu with a katana (real swords) but deflects it with her own. Akira and Kengo also arrive at the place and decide to intervene. Aya is facing the Sword-Killer, who turns out to be Hiroki to hear shock. As Akira and Kengo defeat the Kokuchi, Aya awakens her powers and defeat them. Afterwards, Shirogane tells Akira that he'll need comrades, as they are necessirily. Akira finally agrees, seeing that Aya is very promising in terms of fighting but when Kengo also insists to become his comrade Akira dismisses and ignores him. (Source: Wikipedia)