A flock of ghosts have invaded the mansion and security measures have been activated. The residents are locked in various places of the mansion and are to stay there until morning. In her room, this is the perfect time for Ririchiyo to express her feelings for Soshi, but this proves difficult for her. In the hallway, Natsume encourages Watanuki to use this time to train all night. In the cafeteria, Sorinozuka rests while Nobara plays shogi with Chino, one of the maids. In the kitchen, Karuta becomes so hungry that she starts to cook a full-course meal. Soshi stays up all night while Ririchiyo tries to go to sleep. But before doing so, she thanks him for his service thus far. Watanuki accidentally breaks the barrier, allowing the ghosts, known as the obariyon, to pass through. As it seems that the obariyon are wiped out, a few more come out and jump on Ririchiyo's back. Soshi, who cannot bear the sight of this, destroys the rest of them.