Description:
In main/event stories, occasionally art or card art shows up. It is your job to take a picture and animated the main character/s.

Examples:

Main/event story (refer to 0:49 for example): Nightcord at 25:00 #0: "Opening"【Project Sekai/English Translation】 - YouTube

Animated art: Shiho Hinomori Project Sekai Wallpaper Live2d Animation (youtube.com)