Following the events at the Yasohachi Bridge, Satoru's students receive a mission of a peculiar nature: to find the mole who allowed the curses to infiltrate the high school in order to seize six fingers of Sukuna! The target is none other than Kokichi Muta, the true Mechamaru and one of the Kyoto exorcists...
The teenager has indeed made a pact with Mahito and Suguru, who promised him a new body in exchange for information... except that he must also manage to defeat them to join his friends! Does he stand a chance against such adversaries?