第2話: 合同小隊の訓練演習および地下鉄作戦中に、カサネがナオミを狙撃手の銃撃から庇う。
With Yuito's first mission officially over, he wonders how is it possible that Kasane saved his life back when he was 5. Meanwhile, Naomi suggests to Kasane that they should take the morning off to have some rest and relaxation and they end up crossing paths with Yuito and Nagi. The foursome spend some time together until they are taken to a joint training session between the Seto and Kyoka Platoons. The teams take part in a capture the flag battle, in which Kasane comes to believe that Naomi has a crush on Yuito and uses the battle to test Yuito's worthiness for her sister. Because of Arashi's laziness and Kasane's obsession with Yuito, Seto Platoon wins the match, but suddenly, both teams are called in to suppress an Other breakout at an abandoned subway system. As the teams fight the Others and move deeper into the subway tunnels, communication between the teams becomes disrupted. Suddenly, an unidentified assailant attempts to shoot Kasane, but Naomi predicts the shot with her powers and uses her body to shield Kasane. The bullet embedded on Naomi's chest causes her body to be encased in icy crystals. (Source: Wikipedia)