Society has progressed, and Omega rights are respected, while Alphas are mandated to take suppressants. Kunikage, an Alpha who has a disposition of being resistant to suppressants, is socially shunned. Takumi, a Beta, is the only one who stayed by his side for a long time, and Kunikage secretly harbors feelings towards him. One day, Kunikage accidentally inhales Omegan pheromones in Takumi's research lab and goes into rut. Unable to control his long-wished desire to be topped by Takumi, Kunikage, with his rut-clouded senses, yearns for him...?! 【ずっとこいつに抱かれたかった】Ωの権利が尊重され、αの抑制剤の服用が必須になった世界。抑制剤が効かない特異体質のα・国影は周りから疎外される中、唯一昔から傍にいてくれるβ・拓巳に密かに想いを寄せていた。ある日、国影は彼の研究室で誤ってΩのフェロモンを嗅ぎ、発情してしまう。「拓巳に抱かれたい」という秘めていた欲望を抑えきれず、熱に浮かされるまま彼を求めてしまい――!?