敵が未来から来た宇宙人で物語序盤ではその事実が伏せられており、中盤以降の展開で少しずつ真相が判明していく中、後半からは、それが軸となってストーリーが展開していくことになる。 <br /><br />(For Non-Japanese Viewers) <br />When you watch the video, please click the Gear icon "⚙ "in the top-right corner of the screen to access the subtitle options, then select your language if available. <br /><br />The enemy is an alien from the future, a fact concealed early in the story. As the plot unfolds from the midpoint onward, the truth gradually comes to light, and from the latter half, this revelation becomes the central axis around which the story develops.
