Chapter 75

Ken Kaneki presses Ayato Kirishima on what he actually hoped to gain by joining the Aogiri Tree. The question grates on the younger ghoul, who answers with a flurry of strikes. Once the exchange dies down, Kaneki lays out a deduction: during Touka's earlier lunge at Yamori, it was Ayato who shielded her, and without that intervention Yakumo Oomori would have killed her. He notes that finding Touka alive on the rooftop convinced him Ayato never carried real killing intent toward his sister.

Ayato waves the accusation away, only for Kaneki to cut him off mid-sentence with a sudden kick that puts him on the ground. Making good on his earlier vow, Kaneki slams the boy through the floor and coldly details how he will half-kill him, choosing to fracture one hundred and three bones beginning at the arm. He recites the name of each bone as he crushes it, and afterward tells Ayato that his own torment is nothing beside the pain Touka has carried.

Secret (秘密, Himitsu) is the seventy-fifth chapter and sits in volume eight. The installment recasts the siblings' relationship through flashbacks to Yamori's rooftop confrontation, revealing Ayato's protective instinct beneath his cruelty. Arata Kirishima is mentioned, while Touka, Nishiki Nishio, and Yakumo Oomori appear only in recollection.