In the year 20XX, an unknown virus gave mankind new genders of Ω, β, and α.

Counselor Hojoin Sumire works hard day and night to help people who are confused about their new sexuality. One day, she is attacked by an α patient at her house, but she is rescued by Nobuzaki, who hears the commotion at the last minute.

She feels relieved for a short while, but their bodies are influenced by each other's pheromones, and then...