This is a hard game to review. For soon-to-be 3 years of development, the amount of content fits. This is a big game, with a lot of content, and that's a big plus for any game, and that alone deserves a +1 star.
Bound by Lust has a seriously large cast of characters, and many of their paths are quite far-in, in terms of scale. However, that's maybe part of where the problems begin too ...
This game feels over-extended. It feels like the dev has stretched themselves so far in so many directions that it all becomes kind of vague and diluted and without much sense of theme or focus. What starts off as quite an interesting premise eventually just becomes a very generic, harem-style dating sim, where every love interest will throw themselves at the nerdy god-king turbochad MC. While some may enjoy the power fantasy of this, I did expect something more, given how the game sat itself up in the beginning.
Also, if you are here for any of the optional tags (NTR, futanari, hairy pussy/armpits), you are going to be very disappointed. I played for several hours, and still haven't encountered any futa. The game asks you in the beginning how you feel about body hair on girls, making you believe that your preference will matter, but 2 hours in, there's just a single LI that this applies to. The same can be said about NTR.
In other words: the game sets up expectations at the start, both from theme, gameplay and tags, but they are not really met, and it's really just a very typical, generic harem game where every girl sucks your dick on the second date. And in the rare moments that it's not just a generic harem power fantasy, it tries to be everything else at once. It feels like the dev has tried way too hard to please everyone, and so there's no real sense of direction.
I was really hooked at the start, too. Ancient femdom evils, reunion with your family, summoning a familiar succubus by accident ... Nope:
Fuck your mom, fuck your sister, fuck your other sister, fuck your principal, fuck your teacher, fuck your other teacher, fuck the librarian, fuck student #1, #2, #3, #4, #5 ... All with the most laughably small amount of effort. Everything just becomes a goopy, cum-stained mess, and it's impossible for the player to really invest themselves in any particular thing. It's very all-over-the-place.
The game still gets 4/5 stars, simply because if you rate it for what it is (a generic harem game), it's still a good game that many will probably enjoy. But it does feel like it sets some wrong expectations, and tries too hard to be everything at once without clear direction.