Playboy Beast
Riku is a black leopard in high school trying to keep it a secret that he's a virgin who hasn't had his first heat. His new roommate Touma is a white lion who doesn't want anything to do with him as he studies his butt off by day and meets with his sex friend to blow off steam by night. When Riku gets his first heat, the two become physically involved for the first time, and even though Riku tries to get a girlfriend and live his ideal high school life, he can't get Touma off his mind. This doesn't have the best story, but it has beautiful art and good smut. Trigger warnings: dubcon, attempted rape, drug, rape.
A Virile World
In a world where women don't exist and men transition to female when needed, the panther Agifu is the boss of a garden of cats, and the caretaker asks him to personally look after abandoned white lion, Val. Val becomes totally dependent on Agifu, and as he grows up, he can't stand the fact that Agifu goes to other cats for sexual satisfaction and determines to get strong enough to take him, himself. They're very cute in the first half, but Val is very asswholeish and rapey in the second half. And you can say that's how cats are, which is fair, but it's still uncomfortable to read, and sad after seeing cute baby Val. Trigger warnings: violence, attempted rape.
Shishi no Odoriko