From reading half a dozen or so pages in this thread alone, yes it will blow up in your face.
Ugh, this makes it really difficult because you don't know whom you should dismiss and how that also might end up blowing up in the MC's face...
Just a few examples:
Will the younger sister help the MC when he drops her and doesn't help her with her issues?
And will the coffee shop girl call the police when she figures out something and the MC doesn't try to fix the whole thing?
If the MC doesn't pursue the younger sister of his step mom (2nd wife of his father) will she even help him or will she side with her sister?
Also, might it turn out positively when he forgives his step mom and gets on better terms with her?
And if the MC doesn't pursue the best friend of his mother (incest patch: his mother) will that cause her to not involve him when her business faces a critical situation which then in succession might lead to her and her friend losing their business?
When the author wants us to dismiss certain women then he shouldn't write the story in a way that makes it very difficult to dismiss them. As of now he really designs this story to blow up in the MC's face.
At least that is how I see it.
Maybe you can drop two to four of the side girls but that's it. And even that might cause some issues later on...
And the ladies are all quite beautiful...