Gameplay:
Single path VN Harem.
Let's be honest, it is a very poor gameplay. You just have to click on the highlighted things on the screen in the pseudo game phases. But you don't need to think or worry about doing something wrong. There is just one path. The game feels like there is a gameplay involved (building defenses, gathering ressources, RPG-style combat, exploration, Point&Click), but it's just a sham of it.
Story:
Survival Horror... harem family edition.
The pitch is a survival setting with zombies, sorry monsters appearing after a mysterious mist. For some reasons, your are the snowflake that could survive (unlike EVERY other men on the entire earth that transformed into zombies monsters because of the mist), along with women that were not touch(but were all killed anyway by the men transformed into monsters, except 3 of them. Oh, and a 4th supernatural being, yet pretty useless. And you will stay in a cabin that is, for some reasons, kinda protected from the mist (except when the writer decide it's not).
The story is actually pretty thin. It's promising at the start, but kinda get boring and repetitive. The dialogues turn around the same ideas and you don't feel any progression. Characters are kinda cliché.
Graphics/Animation:
This is the best thing of the game. This is where the author shine. Yes, you may be surprised with the cartoonish design of the girls (oh yeah, it's POV, you only see your hands and your dick), but the animations (lewd scenes) are really good and detailed. Also, the environment is really well made.
Sound/Music
Music background is quite repetitive, but serve its purpose. Sound effects are good.
Overall impression:
At first, I was thrilled by the game. In the end, I was bored with it. What happened? Well, the story didn't make much sense and wasn't consistent or logical, it's a messy patchwork of zombie, magic, dark fantasy ideas, without the actual vibe of it. The story is stretched out with the same gimmicks and tropes. I'm a bit harsh, as a lot of effort was put in this game, and it was well received.