Dajeong is a pediatric resident at Seo-han Hospital who impulsively spends the night with Taekyung, the CEO of the hospital's foundation. "It was... a mistake. I'm sorry. Please, just forget it—." "That's funny, Dr. Yu Dajeong. I don't think that's going to happen." Was she imagining the glint in his eyes? The biggest problem is that Taekyung is the very person trying to shut down the deficit-ridden pediatric department. It was a true emergency situation. *** But this man starts acting strange. "When I start something, I never stop. Once I bite onto something, I don't let go, no matter what." After giving that warning, he follows up with: "I'm good at this. Kissing." "Representative, I...!" "Let's do that cliché thing—the 'getting to know each other' stage." His straightforward flirting keeps shaking Dajeong. He is clearly an enemy who came to eliminate her department, so why is she falling for him so helplessly?