Oof... I gave this a try and well, I have some difficulties reading this through.
1st is the way sentences are phrased, for some reason it reads/feels choppy / not really fluent. Which distracts me from immersing myself into the story.
2nd; there is little to no backstory and the mc is already proclaiming his undying love to his foster mother... ehm... little build-up would be nice? I felt like I missed everything and went straight to the aftermath.
3rd; the first meeting between the mc, his foster mother, veronica, tasha and.... eh... Z(something), was weird to say the least. MC rejecting the whole inheritance outright without hearing what the conditions are, feels rushed, not only from the mc's perspective but the scene as a whole. The story just started but you get thrown from one location to the next without much explanation. The mc is supposed to get explanation at that meeting but the mc and foster mother get super angry all of a sudden?!? (even though the grandfather of the mc is allegedly evil, no reason to flip out to people who did nothing but being hospitable and respectful, except for that Z girl), and after that the meeting is postponed without further explanation... The whole scene felt like beating around the bush.
Also, from what I understand of what I read, the mc didn't know his grandfather that well, everything he knows about his grandfather, his foster mother told him during the road trip to the meeting. How can the mc be biased enough to reject such an amount of wealth outright just because his grandfather is evil? What has the grandfather done to the mc that the mc reacts in such a way? Yeah sure the grandfather was an *ssh*le and messed with the inheritance the mc got. In my opinion that's not reason enough to hate someone with such ferocity. And again, a little more build up would be nice.
Even though I find it difficult to immerse and read this, I'll read this further, hopefully it will improve
edit: Just noticed a scene that was more tell than show. Which I find weird since you have models to show, why tell the reader the character is going to look if you can show that?
PS: I'm sorry if my critique is harsh or too direct, not my intention.
edit2: I'm dropping this. I simply can't get into the story. Too bad, the synopsis seemed interesting though.