One of, if not THE most fascinating visual novel I've played in my life - the writing, the music, and the visuals (gods, the visuals) all come together to create a must-see narrative experience that will stick with you for a long time.
This page says the game takes about an hour to play but do not let that fool you: If you're anything like me you will sit there for three hours minimum looking at the art alone, not to mention trying to get every ending.
If you're a fan of unsettling stories and incredible art, this is ABSOLUTELY the game for you. I can't recommend it enough <3