See the origins of Chainsaw Man mastermind Tatsuki Fujimoto! See the origins of the mad genius who created Chainsaw Man! This short story manga collection features Tatsuki Fujimoto's earliest work. It's rough, it's raw, and it's pure Tatsuki Fujimoto! Killer mermaids, gender swapping, and a devilish little sister with the power to end the world-four more unforgettable short stories that reveal the starting point of Tatsuki Fujimoto, the twisted mastermind behind Chainsaw Man.