For a short game its really not bad, it has some nice art and its all animated and voiced, not that i understand chinese but still ok for the voice effects.
Story is really not the selling point of this one, i dident really find it that good but i did enjoy the card game even though its a bit to easy if you ask me, once you get into it which is easy you will figure out how to combine cards so you can pretty much just one hit any boss, so its not that much of a challenge really.
Animations are good AI art is good, but not sure why you never get to fuck the deamon/sucubus, so its really all about Eve and "training" her to become a better fighter, story is pretty all about Eve showing her self off in all kind of ways and at one point i belive shes even fucked by a shitload of other dudes which i wasent much of a fan off since it feels more like NTR then prostitution to me but just know its there.