主题：深海的守候-说说‘潜伏’ -- 火之虫

Indeed I think this song is excellent and it fits the story very well. The whole story is almost constantly under stress. Its color is gray. The end of the story is specially bitter. However, this song reminds me that the hero is a soldier. He chews the bitterness, he suffers the stress, he sacrefices his everything, as a soldier. He fights for his ideal and his country. That is the core of the story. Therefore this song is like the red flag on a gray background, or the eyes of a painted dragon. Wrapped up with such a song, the story stands up, not lays down.