|N-1||The Secret of Nightland||Night Keepers||5||8||130|
|N-2||The Spy's Name||Night Keepers||2||5||132|
|N-3||Night Festival||Night Keepers||5||8||104|
|N-4||Times Difference War||Yuk-Cheung Chun, Marc Lin feat. Misi Ke||6||9||138-190|
|N-5||Fantasy Hotel||Night Keepers||3||6||76|
|N-6||Steven Bites Time||Night Keepers||3||6||111|
|N-7||The Cure of Sleep||Night Keepers||2||6||73|
- At the price of $3.99, this is the cheapest IAP chapter in Cytus, due to having less than 10 songs.
- This chapter mainly introduces the band Night Keepers and Marc Lin, whom made arrangements for Rain of Fire in Chapter S.
- This is the only chapter in Cytus to have less than 10 songs.
- This is the only chapter in Cytus in which all the songs have vocals.
- The story of this chapter can be found at this link.
- All artworks in this chapter are done by Steven Tung.
- All charts in this chapter are done by LR. This is the only one chapter in the game which contains noticable off-synced parts in all charts.