...The description leaves out the blackmail part of the arrangement. Wish it hadn't.
Edit: After reading other's comments that it mellows out after the first chapter, I read a bit farther...
And it indeed does... but the shady parts of the fundamental premise still hang over things like a pall, infusing every one of her "requests" with the malodour of non-consent, subtly poisoning the themes of budding relationship whilst the protagonist quickly normalizes the abnormal parts of the relationship without question.
(I'm not sure the author even realized that just modulating the tone to be brighter and more cheerful, without addressing the underlying issues at all, is inherently creepy because of the implied normalized-abuse aspect? Or maybe they do realize exactly what they're doing—the first chapter certainly hints the author likes their subtle emotional abuse and creeper stuff a bit.)
(Edit edit: Well, it does sort of come back around to the premise in ch. 5 and maybe it will address it properly, so we'll see.)
But if you were to just turn your brain off and forget that the basis of their little game is non-consensual, most of this would indeed be fairly standard shoujo-ai romance stuff with roughly the sort of romance you'd expect from the existing, blackmail-less description. That much is true.