Hey dev, from your profile I'm guessing this is your first game ?
First of all good luck, I really love supernatural setting and a Futa Protag is the icing on the cake. So I'm rooting for you.
Seeing as this is still in early development, just wanted to tell you to try to remove the Sandbox.
Making it a VN, makes it more linear which is better if you want to focus on the story, a Sandbox makes sense if you really want to make it a "game" and adding combat and other gameplay mechanics in the future. Not if you want to focus on the story.
And in my opinion Sandbox is an inherently frustrating experience especially when there isn't any meaningful gameplay. No ones likes the grind and it's extra frustrating when you are not playing the full game at once, as some stuff will undoubtedly be in development, and it doomed many games before.