I just finished the demo and it was incredible! It has a very interesting story and many interactive objects/npc. I love how there is a different path for each sister, and the special effects make everything even more compelling. I am interested in buying the game on steam and hopefully I might soon!
Thank you. :)
The demo on itch.io was a bit old, the final released version on Steam is way better!
The Steam version has QoL enhancements like equipment change in battles, better tutorials, examine indication and a "Library" to review books that you've found.
Definitely give the Steam version a try! :D