It's a nice game with a rare concept, but it needs work/rework in some things.
There are some areas, like the Annie's end of content that ends in an empty page with no choice to avoid it. The only safe way to not fall in this pitfall is to do a save before you ask her for a date.
In the rest of the game, you have no idea if there is other content or nothing at all. The game lets you trying again and again doing the same stuff and changing nothing at all.
Besides Annie and Sibling, the other characters seems having no content or limited functionality, like the therapist that gives you prescription for pills only or the office people that it seems you can transform them by drugging their food mostly.
These make the grinding feeling more intense and annoying. You need to let us know where there is content and when to stop trying on a character at least.
In other hand, I enjoy the game and keep going~