Yoon San and Haekyung had known each other since they were very young, but after Haekyung’s awakening, their relationship became nothing more than a distant childhood memory. Years later, Yoon San, who had manifested as an Omega, happens to reunite with Haekyung at an amusement park. The two begin exchanging secret messages behind the adults’ backs. During their adolescent years, when their pheromones were still unstable, they could only sense each other through messenger DMs and traces of scent left on their clothes. Now, as fully grown adults, the two meet again on Jeju Island…