In a world where secondary traits alpha/omega are very rare , Baek doha who's a dominant omega typically relies on a one-night service " private call" to manage his heat cycle. However, he suddenly meets up with Ji-hwan, who is an 'Alpha' in one of those scheduled one night stands. Despite Doha's surprise due to the unexpected turn of events involving pheromones and unfamiliar aspects like contraception and knotting, Ji-hwan persists in asking Do-ha to contact him again. "You're not intimidated just because I'm an Alpha right ?"