From a very early age, Yunsan and Haegyung had known one another. But when Haegyung’s manifestation occurred, they both retreated into memories of their childhood. Yunsan, manifested as an Omega, unexpectedly reunites with Haegyung at an amusement park. They secretly resume contact—far from the eyes of others. In their adolescence, when their pheromones were still unstable, they sensed one another through DMs and the scent left on clothing. Eventually, they mature into full adults. They meet again in Jeju Island…