Koyomi learns from Tsukihi and Tsubasa that Karen tried to confront Kaiki by herself. Karen is inflicted with the poison by Kaiki during their confrontation and Kaiki escapes, leaving Karen paralyzed on the floor from the poison. After walking Tsubasa home, Koyomi tends to Karen's fever. Karen tells Koyomi to leave her alone because she does not want to get him sick too. Koyomi then goes to the bathroom to ask Shinobu if there is any way to transfer Karen's fever to him. Shinobu says there is a way but she does not recommend it because it requires an unusual ritual.