Title: Love Shuttle
Doyun feels like he's only a half-omega. From the time he was small, it was clear he wouldn't be the standard, stereotypical omega. As the youngest of four, all his older brothers being alphas, he was the strongest and tallest. What's worse is that he has never gone into heat, which means he can't get pregnant, nor can he sense or put out pheromones to attract alphas. Doyun isn't all that concerned, content with his life as it is, though it does bother him when people assume he is an alpha based solely on his build. The main worry is that one day he might randomly manifest and won't be able to protect himself, but there is no sign of that happening anytime soon, so Doyun isn't all that worried about it.
One evening, after having his regular scuffles at work with his coworker Taehan, Doyun is hanging out at home, trying to sleep, when he is struck with a panicky feeling. His body is heating up, and his heart is racing. He's never felt anything like this before, but he's pretty sure he knows what this is: his first heat. He calls his doctor, who rushes over, only to find that the feeling he had is gone. The following day, at an after-work dinner with his coworkers, Doyun sits beside Taehan when that feeling hits him again. This time, though, he puts out pheromones that everyone at the table can smell. The only one who realizes it's coming from Doyun is Taehan, and when Doyun attempts to leave on his own, Taehan follows.
Rather than Taehan taking advantage of Doyun, Doyun ends up pouncing on Taehan, leading to Doyun's first night in full heat with an alpha. The next day, panicked, Doyun rushes away from Taehan, hoping he'll just forget the whole thing. While they agree to put it behind them, Doyun's body doesn't seem interested in forgetting, going into heat over and over again whenever Taehan is near. Why can't Doyun seem to escape Taehan's allure?