Nice game! The biggest plus is the quality and quantity of lewd animations, those are really awesome. The general story is well written and unpredictable. While the theme is definetely survival, gameplay is more akin to survival light; don't expect an intricate survival game experience. It's quite easy to survive, even on the more difficult setting. It never felt grindy and I like it when devs don't neglect the game side of their adult games. Lewds are nicely interweaved into the gameplay and there's a lot of variety in terms of situations and motivations for them.
Some aspects of the game weighed it down a bit: First, the general story is good but the line-to-line writing could be improved upon. I found it hard to really resonate with the characters. Second, the game can feel really unpolished sometimes: Spelling mistakes, the UI not working as it should, tedious clicking through menus, lack of attention to detail... All of these issues would be fine individually but they collectively stand out negatively.
EDIT: Having played more games in the meantime, I realized that the issues I'm mentioning here are still quite minor. I'm upping my rating from 8 to 9.
Worth the money, had a great time, 9/10.