A Certain Newbie Training of Two

S1 E5: Whilst out on patrol, Kuroko and Kazari come across a couple of petty thieves stealing from a car in broad daylight. However, when Kuroko charges in despite Kazari's warning, the thieves ambush Kuroko and injure Kazari as they make a quick getaway. Kazari scolds Kuroko for not only ignoring her warning, but also forgetting the promise they made together. Later that day, Mikoto is told the story about how Kuroko and Kazari first met in Judgment a few years ago. When Kuroko and her senior, Mii Konori, had gotten involved in a bank robbery, Kuroko's rash actions had led to Kazari being taken hostage by one of the robbers, an esper who can throw balls at a consistent speed, and had caused Mii to become injured protecting her from one of his attacks. Having realized her mistakes, Kuroko had managed to teleport Kazari outside to safety, staying behind to face the robber. In the end, Kuroko had been saved thanks to Mikoto, who anonymously answered Kazari's pleas for help, and had managed to apprehend the robber. In the process of telling the story, Kuroko remembers the promise she made with Kazari was to be true to themselves and become full-fledged members of Judgment together. Realizing her folly, Kuroko catches up to Kazari and joins her in pursuing the car thieves.