Kazuki is the second son of the Sasakura family, a famous family of alphas. He's enjoyed a free life full of sex without ever looking for a mate, but suddenly, he's forced into an arranged engagement! And his partner is none other than Kaoru Kunioka, a quiet hottie from his university who's the heir to another alpha family! People say that Kaoru is the perfect alpha, but he's actually an omega who's just never had a heat induced before. There's no way Kazuki's attracted to Kaoru's rugged, manly body, but it seems that Kaoru is “flawed" and he wants Kazuki to use his alpha pheromones to see if there's something wrong with him. Kazuki promises to help him if Kaoru will call off the engagement once they're done, but will he be able to make Kaoru into a naughty omega?