Are there any romance novels where the male lead is initially indifferent or even antagonistic towards the female lead, but eventually becomes obsessed with her?

Yes, this is a very popular trope in romance novels, often referred to as the 'obsessed CEO' or 'enemies to lovers' dynamic. The core of this trope involves a powerful, often emotionally unavailable male lead who finds himself unexpectedly captivated by a woman who defies his expectations or challenges his control. He might initially see her as an annoyance or an obstacle, but her resilience, unique personality, or hidden depths slowly chip away at his defenses, leading to an intense and all-consuming infatuation. This journey from indifference to obsession is often fueled by the female lead's strength and independence, which he finds both frustrating and irresistible. The conflict arises from his internal struggle to reconcile his controlled nature with these overwhelming new feelings, and the external drama of how he pursues her once he realizes the depth of his obsession. It's this push and pull, the gradual unraveling of his carefully constructed world, that makes the trope so compelling for readers seeking a story with high emotional stakes and a satisfying romantic payoff.