I've tried so many times to enjoy this because many people seemed to get something out of it, but I can't. I got about as far as book four before I got fed up with this game and stopped.
Story
You're the Avatar after Korra dies, and you suck. But you're told by the Painted Lady that the Spirit World will converge with the regular world and that you need to master the four elements and take over the bodies of others while you train a particular element. Book 1 is Water in the Southern Water Tribe as Aang. Book 2 is Fire in the Fire Kingdom as Prince Zuko, Book 3 is Earth in Ba Sing Se as Aang, and Book 4 is Air in multiple locations as some beginner Airbender, but you at the very beginning. Books 1 and 2 are fine. It starts in Book 3, where the game really bloats with dialogue, and then Book 4 becomes unbearable.
Writing
There are moments in books 2 and 3 with genuinely good scenes (at least in the love path). However, we get awful humor between those short moments where we get good writing. Nothing in this game is remotely funny. It's a bad mix of meta-humor and the "MC is horny" humor. If the game could stop with the humor and not click 10 times to get through some dumb joke, maybe it wouldn't feel like it takes eighty years.
Gameplay
When you're not bogged down with terrible humor, you're still just clicking away until you're told or hinted at where to go next. Unfortunately, if you want to get to only the sex scenes, you're gonna need to use a walkthrough or go back to figure out where you need to go next. If you're trying to go through this game without cheating, you will be in for a grind without a walkthrough. If you use the guides provided for books 1 and 2 and another one for book 3, you'll be fine, but there's no complete walkthrough for book 4 (the love path), so you'll have to figure things out independently. Most of the gameplay involves bouncing back and forth between locations for a fetch quest or moving onto the next day to move the story.
Each book has some gameplay mechanic or differing minigames to spice things up, but they are all lazily implemented to lengthen the time you spend. Most of them are for money, so you can cheat your way and avoid them, but sometimes you're forced to do them to move the story along, and some of them require you to memorize so you can't skip to make them go faster.
Sex Scenes/Content
There's a lot of fetish content, so if you've got fetishes, the game delivers. There are foot fetishes, piss scenes, lesbians, lesbians (Korra and Asami are bisexual, so I'm not talking about them) having sex with the protagonist, milfs, gilfs, etc. I only got to the middle(?) of book 4, so I might be missing more fetish content. As for me, I can't say that I enjoyed the scenes; some are "animated," but along with it comes some cringe dialogue, especially from the protagonist.
Conclusion
I'm not giving it a one-star rating because Mity put effort into this game, people enjoy it, and it's completed (roughly, just the epilogue stuff for the slave route needs to be completed). Unfortunately, the game is hampered by a bunch of terrible dialogue, and the attempts to "reward" the tedium were not worth it.