Shirai Kuroko, who was hoping to enjoy the Christmas festivities with her roommate, finds herself assisting Anti-Skill carrying out in Operation Handcuffs. However, contrary to the plans of the new Board Chairman, it has become a violent conflict between Anti-Skill and the members of the Dark Side of Academy City, leading to Hamazura Shiage and Takitsubo Rikou looking for a way to escape the chaos. Not helping matters is the distribution of a new product from R&C Occultics.
This is the second story arc that did not feature an appearance by Kamijou Touma along with Battle Royale Arc. Instead, it features Shirai Kuroko and Hamazura Shiage as the key characters, the former for the second time following the Tree Diagram Remnant Arc.