“I just want to surrender everything to the alpha right in front of me.” Tsuneyoshi, an alpha acknowledged by everyone (including himself) as exceptionally outstanding, was supposed to spend yet another perfect day today— or so he thought. In the middle of an extremely important presentation, he suddenly enters omega heat. His pheromones flood the conference room full of alphas, and…!? After managing to escape and return to his apartment, he is helped by his neighbor Asakawa. But when he discovers that the neighbor he had always thought was a beta is actually an alpha— there is no longer any way for Tsuneyoshi to suppress his aching, needy body… While being pinned down by Asakawa, he is made painfully, unmistakably aware that he has become an omega. And then he learns that Asakawa is also a sudden-onset mutant alpha—

Original Japanese:
Volume 1, Volume 2