This episode mainly focuses on the friendship between Yorito's sister Aono and Mana's little sister Koyori, both of whom are staying at the hospital. Koyori, who is to be released soon, has trouble conferring this news to Aono. The relationship between Yorito and his sister is also explored, as more information about the dolls he brings her is revealed.

Aono has come to kill Matsuri in an abandoned part of town and a one-sided battle ensues with Aono attacking while Matsuri runs for her life. In the end, Aono cannot bring herself to kill Matsuri and leaves afterwards. After suffering another mental attack, Yorito is brought to Mana's place to keep him safe from Aono who later comes looking for him; Mana manages to get her to leave. Later, Matsuri runs into Takeshi again who once again tries to kill Matsuri and nearly succeeds, but Mayuko intervenes in the end and saves her life.

Yorito and Aono are planning on leaving so that things will go back to the way they were. Mana tries to get Yorito to tell her who he really is, but he does not say. Later, Mana is out with her friends and she brings up Yorito in conversation, but discovers that everyone else but her has already forgotten about him. Scared of what this means, Mana runs to the school roof and finds Yorito alone. After sunset, however, Mana finds herself alone on the school roof having forgotten about Yorito. Takeshi and Mayuko leave town near the end, and Matsuri goes to Aono's house with Takeshi's sword in hand.

Matsuri tries to forcefully stab Aono with her sword, but Aono moves out of the way in time; she still manages to get a wound on her shoulder. While Aono runs away, Yorito is left with an arm missing and he slowly becomes weaker since Aono is losing her Yaka powers. Matsuri tells Yorito to not intervene and goes after Aono. During the fight, Matsuri loses her sword, and Aono takes it up to shove it into Matsuri, but Yorito, not listening to Matsuri's heeding words, intervenes and he is impaled on the sword. Yorito then disappears in a flurry of paper followed by Aono's shrill cries. Matsuri does not hesitate this time to stab Aono and after the sun rises, Matsuri also disappears, but Aono is now human. One year later Aono comes back, and no one but she herself remembers who she is, or any of the incidents that happened. Aono meets with Mana and Koyori and they become friends again.

This episode serves as a prologue to the series and leads up to the events at the beginning of episode one