Reviewing as of finishing the Book of Water, Fire, and Earth. (Excited af to see what the Book of Air brings, if the content of these past couple books has been any indication of quality!)
Overall, this game is easily well deserving of a 5 star rating. Not excessively grindy, plenty of H-scenes with plenty of characters from the source material, and enough content to last someone well over a week. If I had to rate each book individually, however:
Book of Water: 3/5
-It's easy to tell that this was the first book, due to the limited writing and mechanics. The H-scenes were the weakest in my opinion in this book as well, but certainly not bad. That's about how I'd describe this book overall, is average. About on par with your standard h-game/trainer.
Book of Fire: 5/5
The starkness in quality between Water and Fire is like night and day, if I'm being honest. Mity must've paid close attention to the feedback they were receiving and improved on just about everything, while also tailoring in some great genre-work into the relationship between the MC and Azula. There was an incredible amount of content in this book, and it kept me invested for at least a dozen hours. The story also got surprisingly deep, and the ending made me want more immediately. My favorite book, if the rating is any indication.
Book of Earth: 4.5/5
Book of Earth continues in the right direction, following much of the expectation and precedent placed by the Book of Fire while maintaining a quality story to tie all of the books together. There's a great amount of content in this chapter as well, with much of it focused on Toph. The only qualm I have with this chapter is simply that I wanted a bit more content with the side characters in this chapter, since they were all so well drawn! That being said, that's hardly much of a complaint considering this book managed two entirely separate routes while maintaining the length of complexity of the previous book, so I'm extremely optimistic to see what the Book of Air will be able to bring.