Relax, everything’s going according to my plan.
And about the harem — if I say this game is a harem, it’s because it is going to have one. The kind everyone knows. It’s just that the game is only getting started, so it might not look like it yet.
I hope the master plan includes the option to tell the ex-girlfriend, who won't leave her husband, to fuck off and do the same with Azumi, because once she accepts the MC's plan, I don't want to have anything more to do with her.
On the other hand, after seeing the MC's plan for Azumi, I've decided this MC doesn't deserve an ounce of respect since I'm not keen on playing jerks. It would be nice to see how you solve this (though I see little chance of achieving it), because the only real solution would be to allow us to choose an option where the MC isn't a jerk.
Regarding Monica, there's no solution, and it would be nice if you let us break up with her (being able to choose, since, you know, this is a game). In fact, it would have been better to allow it from the start. It's not necessary to kick her out of the game; simply being able to avoid the sexual (and not romantic) relationship would be enough.
They're just waiting for the MC to come to town like always, and boom, he's got a house with his women.

It's so funny.
Actually, if the game worked differently, the harem would already be in motion, because the MC has sex with one girl and a plan to turn another into his personal prostitute (I still have to see what happens in the third chapter). But since neither of them will be part of the harem (and from what I've seen, I don't really want them to be part of it. In fact, I don't want the MC to have sex with them, but I probably won't be able to avoid that part), for now we're back to where we started, possibly worse, because there are two fewer girls.
What we really want is to spend our time courting girls who will be part of the harem, not wasting it on others who won't. Because at this point, I don't want either of them (Monica and Azumi) to be part of the harem in the future (and I don't need to be patient to know this, for those who ask for patience).