Everyone is littered with regrets in the twenties, and so is Subin. All in one night, he got drunk, lost his mind, and awkwardly expressed his feelings to his straight roommate. It takes him two years to gradually pulls his life together. But, at the moment when he thinks that everything is finally on track, Hyunwoo, his former roommate, comes back from the military. Does Subin actually move on? Will he fall for Hyunwoo again? And what will happen between them?