The whole thing runs on real footage, which is weird at first because you're clicking through menus and then suddenly Hitomi Tanaka's actual tits are on screen. Not a render. Her. The summoning mechanic is basically a gacha pull but instead of anime jpegs you get clips of her getting railed. Takeshi is a loser who gets a book from his grandpa, classic setup, and now he can corrupt anyone. The corruption meter fills up and then boom, hardcore scene.

I spent way too long trying to unlock the demon girl route because the spell requirements are vague. You need specific items from the shop but the shop refreshes randomly so I kept getting the same useless talisman. That part annoyed me. But then I finally got the succubus summon and the scene was Hitomi in red lingerie doing this whole ritual thing before the creampie finish. The audio is just moaning over a loop, no dialogue, which is fine because her voice is dubbed anyway.

The open world claim is generous. It's more like a point and click with a map screen. You click the school, the park, the shrine, and each location has one or two events. The real model tag is doing heavy lifting because the porn is the only reason to keep clicking. Some of the clips are low res, probably ripped from old JAVs, but Hitomi's scenes are crisp. There's a magic system where you spend essence to corrupt targets and if you fail the RNG check they just walk away and you wasted resources. Classic.

Wish there was more variety in the Asian models. It's mostly Hitomi and a few others who look similar. But for what it is, a browser game with real porn and a summoning gimmick, it works. Just don't expect an actual open world.