Riku Otaka is a cute, petite high school student who is an alpha, although he doesn't look the part. One day, when he gets into a quarrel with some classmates who picked on him, he ends up injuring Yoshinori Aoba, his research-obsessed alpha classmate. He tags along to his research laboratory to apologize for his mistake, but ends up accidentally drinking a reagent that supposedly turns alphas into omegas!? For the first time in his life, he releases pheromones, and experiences a heat… His body gets wet immediately, and he turns into a mess. The exited Yoshinori draws him in with his feverish gaze, making Riku desire him... An energetic, omegaverse romantic comedy about a sudden transformation!