In the present day, it is said that the genes of Alpha and Omega have become extinct.

Misaki, who has an ordinary and shy personality, secretly has feelings for his childhood friend Rikuya, who always protects him. One day, while they are on their way to university together, Misaki suddenly emits a sweet smell from his body, and the passengers, inspired by the scent, attack him. Misaki is confused as to what is happening, but his classmate Kaito, who is a member of the genetic research lab, tells him that Misaki is a rare "throwback" of Omega...!? A love triangle in the Omegaverse, at the mercy of fate!