Daichi is a young dental technician. He is called a prince due to his excellent skills at work and his handsome appearance. One day, he meets again his childhood friend Manatsu, who has just began work as a dental hygienist at a clinic in the suburb. Meanwhile, Daichi receives recognition for his work by dental clinic director and dentist, but his father, who runs a dental technician's office, thinks Daichi's skills are not good enough. Daichi then receives a complaint from a patient. Manatsu tries to comfort him, but they end up having an argument.