I really like how each new chapter adds more depth to the characters and world. When I started the game, I thought the story was just a thin excuse to put a bunch of girls in a hotel but now I care about the characters, android lifespans, and the robot/elf revolution.
I made it a goal to give the player something to care about, something to protect. And I mean really, actually, care. Not just told to care. Those connections hopefully make the player invested in their well-being and goals, which should in turn make the player more invested in the story and world. I'm glad you like it :)