Society is divided into three 'verses' or secondary gender: Alpha, Beta, and Omega. While betas make the most of the population, alphas and omegas are capable of forming a special connection through mating. Yukimura Habaki is a newly transferred police inspector currently handling a case concerning murdered omegas. Being an alpha, he can't help but worry about his mate, En, even though they have a somewhat distant relationship. On the other hand, En is plagued by guilt on the web of lies he's woven around his relationship with Yukimura. Will their relationship continue or fall apart once everything is unraveled?