In a world where people are classed according to their sexual expertise, Reji is an Innocent, frustrated in his unconsummated relationship with a woman. He decides to test his sexual orientation by visiting a gay club—but it all goes horribly wrong until Shen, an expert Teacher, shows up to rescue him. Once Shen meets Reji, he knows they're right for each other... but there are trials and insecurities to deal with, as well as Shen's commitment to another man, before the two men—or three—can find happiness.