Sungjong is normally pretty fearless, except, unfortunately, when it comes to going to the dentist. Because of this irrational fear he drags his best friend Myungsoo with him to his next checkup. That turns out to be a bad idea when Myungsoo meets and immediately becomes enamored with the dentist, Dr. Lee Sungyeol, and what's worse is the doctor seems to feel the same way. Sungjong soon finds himself unexpectedly and unwillingly third-wheeling at his own dentist appointment.