"Don't make me go into heat...!" Tanizaki Yuki is an elite employee of a major American company. He has a heat, but he does not emit pheromones that can beguile people. He has been living his life as a “harmless Ω”. However, on the day he comes to Japan on business, he suddenly goes into heat. He has sex for the first time with an alpha male he encounters, and discovers the pleasures of being an omega, But the man, Fujimine Kazuma, is a colleague at the company to which he has been transferred...! 「俺を発情させないで…！」 アメリカの大手企業に勤務するエリート社員の谷崎悠紀は 発情期はあっても人を惑わせるようなフェロモンが出ないため、 “無害なΩ”として生きてきた。 しかし、仕事で来日した日に突然発情してしまう。 出くわしたαの男と初めてセックスをしてΩとしての快感を知ってしまうが、 その男・藤嶺和真は、出向先の同僚で――！？