The meme "Killing Chainsaw Man Is The Reason This Heart Still Beats" originates from Chapter 144 of Tatsuki Fujimoto's manga series, Chainsaw Man. In this panel, the antagonist Katana Man dramatically declares that his singular, obsessive desire to defeat Chainsaw Man is his sole motivation for living. Due to its dramatic intensity and highly specific declaration, the panel quickly became a popular reaction image and snowclone online. Users frequently replace "Killing Chainsaw Man" with their own hyper-fixations, anticipated media releases, or spiteful rivalries (e.g., "Seeing my enemy fail is the reason this heart still beats"). It is widely used to humorously express that someone is being kept alive purely by a single, absurdly strong driving force.