This specific phrase, , typically refers to a drafting guide for a "Little Dark Age" style edit of the Attack on Titan Season 4 ending theme ("Akuma no Ko" by Ai Higuchi).

The soft piano or acoustic beginning of "Akuma no Ko."

These guides are popular in video editing communities (like TikTok or YouTube) for creating synchronized montages.

70–100 (to make the Season 4 animation lines pop). Vignette: 20 (to focus on the center of the frame).