Complete the indicated task to unlock the corresponding image at the "Gallery" menu.

Image	How to unlock
Electrical Damage CG	Complete level 1 in Abyss mode.
Izayoi CG	Complete level 7 in Abyss mode.
Jin & Ragna CG	Complete level 10 in Abyss mode.
Kagura Girls CG	Complete level 2 in Abyss mode.
Kagura Setting CG	Complete level 3 in Abyss mode.
Kokonoe Gadget Plan #1 CG	Complete level 5 in Abyss mode.
Kokonoe Gadget Plan #2 CG	Complete level 6 in Abyss mode.
Noel & Mu CG	Complete level 9 in Abyss mode.
Nu-13 CG	Complete level 8 in Abyss mode.
Terumi Setting CG	Complete level 4 in Abyss mode.