Want to preface this with not trying to be mean or rude or anything like that.
I won't say much on the artwork side of things, since I always think that's probably the easiest thing to work on, and placeholder artwork is probably better then nothing at all for this kind of thing.
But first, and I'd say personally foremost, the writing really needs a proofreader. It's fine if English is not a strong suit or anything, but of the parts that make a game, I think writing can really carry a lot of weight. And as it currently stands, the writing is extremely rough. Having someone to go over the script and rework it to make everything read more 'naturally', will certainly give the game a lot more appeal, I'd think.
And the next part I'd comment on, is the gameplay. Which right now, isn't anything too special or amazing, but certainly can use some work. I've only used Kurona thus far, but the current loop of combat isn't bad inherently, but the fact it seems once your MP runs out, you're basically completely defenseless/useless, and there's no way to actually get your MP back in a fight is pretty rough and punishing.
It might be accurate to Bleach in some way, I'm not sure (I admit, I've only had a passing interest, and only really know the early stuff. I do like the characters though).
The, for the lack of a better term, "battlefuck" combat seems really weird as well. It either seems to be an attempt to have interactive sex scenes in RPGMaker, or some kind of 'combat' that doesn't seem to work right? There's also a billion options, which makes me think the intent might be to go for interactive sex scenes of sort. I'd say commit to one or the other, and I'd personally lean to the "battlefuck" angle, but that's just a big personal bias.
The last thing I want to bring up as a complaint is bugginess. As it stands, I don't even know how you save. Again, only played as Kurona, but she seems to completely lack a save option at all.
All this aside though, I do wish you the best with this project though. I don't have any inherent issues with the concept, it's just really going to need some polish to shine. As long as you've got the passion and drive, I'm sure you can work on this and turn it into something memorable.
EDIT:
I also forgot one thing! The folder of guides and stuff, is actually a pretty nice touch.