[Yang Sun] How much do you think you know about me?

Jeong-won, a composer, gradually lost his emotions due to a past incident, and now he's completely devoid of them. Then, one day, Jeong-won meets singer Sun-woo. Sun-woo, a singer, hears Jeong-won sing, and because Jeong-won's bright yet somewhat dark style is something he's never tried before, he finds himself drawn to Jeong-won with difficulty. As they meet, Sun-woo learns of Jeong-won's wounds and tries to heal his heart. The two of them rely on each other and fall in love.