Spiral: The Bonds of Reasoning Vol 7

From the Yen Press edition

Though Ayumu is steadily losing confidence, the Blade Children are gearing up to act against Kanon's threat. Claiming the newspaper room as their temporary headquarters (much to Hiyono's dismay), Rio, Kousuke, and Ryouko organize their offensive with an array of modified anesthetic weaponry to take down their former friend. But when Eyes makes an unexpected recovery, Kanon is pressured to make his move, putting Ayumu and the entire school in danger. How will Ayumu's logic and reasoning fare against Kanon's brute violence?

Source: Yen Press