2chi城 is the 13th song in the original soundtrack album. As with all the other OSTs, it was composed and arranged by Hiroyuki Sawano.
- By taking the "on'yomi" readings of the numbers, rōmaji, and kanji in "2chi城," the title can be read as "にちじょう," or "日常," meaning "Everyday Life" (lit. "Everyday").
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