So anyone know what this is? "Shift" is the tag for the last 3 uploads by STS, is it a series of original characters or something else?

post #955315 and post #956683 are the other two.

I was going to take a look into this, but forgot about it. Anyways, based on the commentary in post #955315 and subequent googling, Shift is a light novel series that has illustrations from STS.

The full title is シフト-世界はクリアを待っている, probably something like "Shift - Waiting for the world to clear", romanized as Shift - Sekai wa clear wo matteriru. Tagged as shift:_sekai_wa_clear_wo_matteriru.

Japanese wiki