>>718925138
Jap publishers hate DRM-free. They would sooner publish on DMM or DLSite and cut themselves off from western sales before they'll publish on a DRM-free store. Just look at Dungeon Travelers 2. It's on Johren, it's on DMM, but it's not on GOG or any other site despite sizable demand.

>>718760912
Luminous Arc (but you probably already know this one) (Vanessa, Fatima)
Dungeon Travelers (Lizerietta from 2)
Mary Skelter (Gretel)
Fire Emblem Awakening (Nowi)
Senran Kagura (Shiki, maybe, she's not a loli or a flatty, but she does have witch aesthetics)

Generally, check any pre-2020 Japanese moe ecchi game and there's a decent chance you'll find a design like this. Unfortunately, they're borderline extinct now after the (((west))) cut Japan's balls off.