You are a Stelleria, with the power to transform yourself, wield magic and enter dreams. Still, all is not well. Nightmares, led by the Empress Nyx, prowl around people's dreams. Your task is to stop them. By the way, you are also an ordinary student, with the usual mundane duties of showing up in class and being a good member of your school club. Interestingly, another writer took over the game from the first one, but the overall story was smooth, and you could've convinced me that this was the work of a single writer if I didn't know.
The worldbuilding and lore is pretty interesting, and got me engaged. Polaris was an interesting animal companion to have, supporting the mc and being around with them to provide guidance. Polaris does remind me a little of (...digs through ancient memories...) Kero in the Cardcaptor Sakura anime, but perhaps with a bit more seriousness and less comic relief. (On another note, Sakura is one of the default names.)
The characters are also interesting. I went with romancing Kit on my first playthrough (something I decided on a whim) but I think the whole 'switch to good side' character arc was pretty good and tied in well with the romance. The game was also solid from a romance standpoint, with dances and flirting.
Gameplay is pretty much what you'd expect in a choicescript game. You try to build a couple of strong stats, and use them to deal with the challenges ahead. My first character was fairly diluted statwise (since I was bad at planning), but I largely focused on Eloquence and Magic, and was able to get through most of the checks with these two. There are a good number of interesting events as you investigate dreams, while being a dutiful member of your club and working on an upcoming festival. My club won the festival, and I managed to score a ride in a nice car, so that works for me. Of course, the bad guys rained on my parade right when things were looking good, but I managed to put a stop to them. (Interestingly, there was a choice to join the bad guys, but it was grayed out for me.)
That said... there is one substantial negative I'll bring up, although it's perhaps more of the YMMV variety. The game doesn't really have the anime vibe to me. At the end, the game felt a lot like an American High School modern fantasy story. The characters just didn't have the kind of cuteness, charm or silly humor you'd see in an anime inspired story. For example, I played The Witch's Bakery (a cancelled choicescript title), and I could really feel the JRPG vibe in the first few pages. I just didn't get it here. It's hard to describe, but there is a certain stiffness in the writing that didn't make it feel like an anime-inspired game.
All in all, I would still recommend this on the basis of the story, characters and writing. Still, if you were hunting for an anime novel, this might not be it.