第 1 集: 軍事掩蓋與牆壁發現引發公眾反應，同時新威脅出現。
2017年4月1日 播出
Coupled with the military's cover-up of a previous incident, the shocking discovery inside the wall causes a stir. Elsewhere, while the new Scout recruits are held for observation, a surprising threat appears. (Source: FUNimation)