After the fight with Takeshi, Matsuri gets injured and Yorito tries to protect her by bringing her back to his home. After she wakes up, she tries to thank him by making him a meal, but due to her limited knowledge of the modern world, it does not work out. That night, Matsuri intended to leave Yorito's house without him knowing, but stayed to look at the sky painted on the ceiling of Yorito's room.

Yorito and Mana search for Matsuri after she disappears on the night she kissed Yorito. Almost a month passes from Matsuri's disappearance, and Yorito has almost given up hope on her return. On a date out with Aono, Yorito accidentally runs into Matsuri again inside a convenience store and gives chase, leaving Aono alone. Yorito catches up to her to find out she has been living with Mayuko in an abandoned building. Aono is left wandering in the rain alone and is angered by Yorito's desire to be with Matsuri. Back in the abandoned building, Matsuri collapses after being stabbed by a piece of glass by a seemingly mentally vacant/unconscious Yorito who seems to be controlled by Aono.

Matsuri has come to Aono's house and go into a conversation about who Yorito chooses to go with — Aono to a different place, or Matsuri, whom he has asked a favor from. The two Yaka begin a battle in the wrecked construction area while Yorito waits in an old theatre. Just when Matsuri is able to deliver the final blow to Yorito and Aono, the old camera in the theatre comes on and displays the sky. Matsuri has a flashback and from what Takeshi said, drives the sword into her own self, much to the dismay and horror of the siblings.