Title: Playboy Beast
The world has evolved. Through various human experimentation, a second species of human has been created through a mixture of animal and human DNA: demi-beasts. Unlike pure humans, demi-beasts undergo animalistic breeding periods known as heats once they reach puberty. Males long to impregnate females, while females want to be impregnated by males. Unfortunately, for panther demi-beast Riku, though he's long since passed the age of puberty, he's yet to have his first heat.
It's not that big of a deal, but as Riku gets older, it becomes more and more concerning, especially when female demi-beasts begin approaching him. Desperate to initiate a heat, Riku ends up dating a fox demi-beast female, hoping to coax out his sexual urges by going on dates with her, but no matter how hot she might be, he just doesn't feel compelled to go into heat. Things only become more complicated and frustrating when Riku's living situation changes. He ends up being roomed with an albino lion demi-beast named Touma.
While Touma initially appears to be a run-of-the-mill book nerd, he turns out to be a bit more of a delinquent. Touma sneaks off campus overnight and has a casual sexual relationship with the school nurse. He's everything Riku wishes he could be, or so he thinks. After Touma finds out about Riku's perpetual virginity, Touma is all too happy to toy with Riku's innocence and get Riku's heat started. As it turns out, Touma isn't everything Riku wants to be, but everything that Riku wants.