Hmm. I'm gonna be boring and say its graphics. No matter how good the story is if none of the characters looks attractive to me it's a deal breaker. Its a porn VN after all. And so far none of the characters in the screenshots at #1 looks interesting to me. The robot girl with cybernetic jaw above does looks cute though. So I guess the big question will be. Is she a LI?
Just like
Walter Victor said, the android girl is
Artemis, the titular character of this game. I don't know for certain that she will be a LI or not, but there are a lot of players that will love that. One thing for sure is that
Artemis has the required anatomy to perform sexual activities
. Will she be able to love, have emotions? Only
digi.B knows.
She will have more screen time in Book 2 ( Chapter 5 to 8 ) and had very limited appearance in Book 1 ( Chapter 1 to 4 ). Book 1 is basically an extended prologue introducing all the main characters. The game will have 4 books ( 16 chapters ) in total.
As for the graphics, the promo pictures are from much older, earlier version of the game. The renders on earlier chapter are not bad but they aren't best either. However, they do get better, especially the preview pictures for Chapter 5 are really amazing. The developer is also progressively remastering the earlier scenes. You can check out the LIs in this post
here. There are plenty of LIs images posted on this thread if you need more convincing but much easier to play the game and find out the LIs on your own.
Attractiveness is subjective so you have to decide for yourself. Personally, I like all the girls except one, Vulvamort, not because she is ugly but because she is the antagonist.