Gareki’s desperate search for Nai is finally over! But his troubles have only just begun—Nai’s fleeting appearance is accompanied by the other Karoku and his behavior is anything but normal. When he vanishes through a mysterious portal after leaving Gareki with a cryptic question, Gareki’s burning desire to save his friend pushes him to follow. Meanwhile, Hirato’s investigation into Kafka’s presence in the Allonga village is interrupted by a strangely familiar face…