- Ideal is dissolved.
By order of appearance:
- Rampage Dress - Hokaze Junko (flashback)
- Approval by the Academy City Board of Directors is required for promotion to Level 5.
- Given that Shokuhou is wearing her winter uniform, the final scene is set after the uniform switch-over on September 30th.[Chapter/Part reference]
- Kihara Noukan warned Shundou Toshizou that the city's ruler is not as generous as himself. Shundou was killed later by Noukan because he ignored the warning.
- Two female members of the Academy City Board of Directors who are afraid of aging and compete over methods of staying young are mentioned by Shokuhou Misaki. One is the member who runs Tokiwadai Middle School. The other is Yakumi Hisako.
- Vantablack is one of the darkest substances known, absorbing up to 99.96% of visible light. The name is the compound of acronym vertically aligned carbon nanotube arrays and the shade black.
- Kihara Noukan "But remember one thing. This city's ruler is not as forgiving I am. This is your last warning, Shundou Toshizou." - to Shundou Toshizou.
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