For whatever reason, I've been interested in this VN since I saw this review, but I clearly didn't read it because I didn't know Sable was the protagonist.
Anyways, I'm finally reading this and goodness me how I appreciate a magic school story of this scale with loads of characters and interactions. I haven't read any route yet. In fact, I have no idea how I'd get into a route, since the choices I've made so far have put me all over the place talking to all sorts.
I'm properly warned not to expect romance, and frankly I'm not looking for it if the game isn't trying to tease it (as I've found out, that's the reason I tend to dislike a lack of romance; it's because it's almost always teased and used as a hook to keep one reading until the end).
Sable is an absolutely fantastic protagonist as he is. From his interests to his interactions, where he's too honest for his own good and where he gets the exact same impressions from conversations as I do ("Something was strange about her today." or "She has a number of flaws, but maliciousness isn't one of them.").