I hate to tell you
- The Extra difficulty chart is unlocked after watching the Falling Girl Memory in playthrough 2 (requires Forgotten Hourglass).
- In the Brave Frontier and Deemo collaboration project, Brave Frontier released a free capture-able unit, dubbed as "Deemo and the Girl". One of the forms known as "Dark Deemo and the Girl" consists of the Little Girl from the Saika artwork and Deemo wearing a Kitsune mask.
- This song can be found in Cytus, VOEZ and Cytus Omega