Collapse

Collapse (瓦落瓦落) is an extension technique of Kento Nanami's Ratio Technique that applyies its effect to an wide area.

Description
With his tie wrapped around his fist, Nanami creates a large weak point in the environment and punches it with incredible force. The critical hit forces the environment to collapse in on itself, trapping anyone nearby.

Nanami first used this technique to finish his first fight with Mahito. Since he couldn't injure Mahito's body, Nanami targeted the underground sewer environment around them and completely imploded the underground passage. This crushed Mahito and allowed Nanami to escape with his life.