Marking Omega

Tori Yoshida is a 'flawed' omega. Unlike other omegas, he has a unique constitution - he doesn't go into heat, ever since puberty, and can't smell or feel alpha pheromones. While this may be a setback for normal omegas, it's his saving grace that landed him his job as a teacher in a world where omegas are at a disadvantage. Everything is well until...