I really liked this VN. I would highlight above all how the author has been building the story little by little.
One thing that shocks you at first the appearance of the sister, being almost dolls, but eventually, you get used to it do not notice it. I would say that the weakest characters are the lesbian couple. You can tell that they are placed to give "action" to the game, but their story es weak. Meiko es a character with potential, but in the following updates, you have to focus more on her.
I'm a bit shocked that with the MC we see her face in a few occasions and in most of the game we don't see her face. And his attitude on some occasions is too helpful, you can't tell he's the eldest of the group.
Otherwise, it's a great game, and looking forward to the next updates.