@Bluey Sara is shy and inexperienced, and MC is her first love and kinda goes the extra mile to make him happy and to have his love, which is naive, although in its own way it's adorable but she shouldn't have to but apparently she wants to, and MC is well aware of this, which is why part of me gets the feeling that MC is using Sara, but I also have this feeling that MC genuinely loves Sara, he just thinks with his dick first. But I do hope for the best though.
The most potential I see is with Linda and Caroline, and story wise Caroline would make the most sense, she would be the most optimal woman for MC, considering that they've always been extremely close and there's something building up between them, more than sibling love.
I'm not 100% sure how things could really develop with Linda and MC though, right now she comes off as extremely lustful of the MC, so much that for years she's been longing for him and for about as long as she has, the marriage has been failing, so is it just lust for MC, or is she also romantically drawn to MC, does she intend to become a romantic couple with him, or is he to be just a side dick because the old man doesn't do it for her the slightest.
Overall it's an explosive and disastrous situation at hand, but the potential for romantic relationship with them is there, and it can work, I guess it comes down to how the MC plays the cards at hand.