Cheong-ho is a member of the national swim team, but has been struggling with poor performance. As an alpha, he knows that having sex with an omega could greatly improve his physical condition, but he’s afraid of omega pheromones. His hopes of becoming a top swimmer seem to be fading until he meets Yi-rim, an omega whose pheromones don’t give off any scent. Yi-rim is happy to help Cheong-ho and they begin a purely physical relationship that feels like a match made in heaven. But despite their strong physical connection, they find it difficult to truly connect emotionally.