The world is divided into three species: Alphas, Betas, and Omegas. As everyone knows, Alphas are the owners and dominant figures of practically everything; Betas stand as the middle ground, the so-called 'normal' people; and lastly, Omegas, a rather unique species. Once considered the weakest, time eventually proved that Omegas had the same potential as Alphas.

Chuuya Nakahara is an Omega. Born into a loving and supportive family, he was raised with the proper education, not to become a baby-making machine, but to grow into a man who could stand tall on his own.

His interactions with Alphas had always been nothing out of the ordinary. Some were kind, others arrogant, and a few simply a waste to society.

He had never pursued a romantic relationship with any species, uninterested in that aspect of life. Whenever his heat came, he was always prepared, taking precautions and excusing himself from work without hesitation to lock himself inside his apartment and endure those torturous days.

Instead, the redhead dedicated himself to teaching, working as a professor at one of Japan's most prestigious universities.

Two years into the profession, he could confidently say he had experience.

Chuuya thought he was prepared.

Until fate proved him wrong.

One morning, on his way to class, he turned a corner without paying attention and collided with a broad chest. It lasted less than a second, yet a potent scent overwhelmed him, flooding his lungs like a cigarette.

His instincts, dormant for so long, ignited like a wildfire.

Nakahara looked up and met the most intense, chocolate-brown eyes he had ever seen in his damned life. They belonged to a man even more striking, unmistakably an Alpha, radiating that intoxicating, addictive scent.

The brown-haired man seemed just as entranced, inhaling deeply as if savoring the Omega's presence. Inside, Chuuya's Omega purred in satisfaction; something Nakahara had never heard before.

'My Alpha.'

That's what his inner Omega whispered with bliss.

But before he could say a word, the man apologized politely and rushed off in the direction he had been heading.

Chuuya was left standing there, stunned. Then he noticed the sidelong glances from those around him, as if he'd lost his mind.

Shit, he had gone into heat right there, from nothing more than brushing against that Alpha.

Even now, he still feels embarrassed about the whole incident. He had never once had a face to picture during his heats. Love at first sight (at first scent) apparently.

A few days later, Chuuya learned that the Alpha's name was Osamu Dazai. He was the new hire, a fellow professor, and the same age as him. From what he could tell, the man was confident, capable; good at just about everything, really. A bastard, yes, but a good man all the same.

And today, Chuuya had decided to finally introduce himself to what might just be the love of his life.

With confidence, the redhead approached Dazai's desk in the faculty lounge. Even from there, he could smell that overwhelming scent.

Chuuya hated to admit that his inner Omega was practically purring like a train engine.

"Hey, um… Dazai. Nice to meet you, I'm Nakahara Chuuya." He smiled warmly. "You're new, right? If you'd like, I can give you a tour of the campus so you can get familiar with the place."

The Omega felt proud of himself for not screwing it up, for coming up with the perfect excuse to (get to know better) welcome his new colleague.