I haven't even FINISHED my playthrough of this game I can say without a doubt I love it. I'll honestly say I never expected the story's plot to hit at my heart strings as strongly as it did, they even hinted to in the above synopsis of the game. The longer I play this game the more attention and especially DETAIL I see the author has put into it all. Not just the environments but with each new scene I genuinely feel like characters feel more real and because of that it's hard not to love and fall in love with every single one of them.
Helen a character I had zero attachment to in the beginning easily became my favourite. The same I can say for Shinigami who to me felt like an annoyance became genuinely interesting (even cute) to outright frightening at times. But these are just MY favourites and again I still finding myself loving these girls and the mystery of the story that binds them all together.