In a world where Alphas and Omegas make up less than 1% of the population, Omegas in heat are even rarer.

"Doha, you're an omega and you may not recognize an alpha, but your body always will."

Without an alpha to help calm his heat, Baek Doha relies solely on a discreet dating service called Private Call.

Yoon Jihwan, formerly a company worker and now a popular fashion model, is contacted by his former boss to cover the absence of sick employee Sumin.

The job in question?

“Wow, he seems to be a real beauty, but what is that sweet aroma emanating from him, some kind of perfume?” JiHwan, who has never been with an omega before, follows him to the hotel room.

"What is this? “He…he's mating me, there's no mistake, he's an alpha!”

Did Doha get more than he bargained for this time?