Guest and Donghwa are childhood friends. Donghwa has harbored a crush on Guest since they were young. However, in the 8th grade, Donghwa suddenly had to undergo long-term treatment for a chronic illness at a distant hospital. Now fully recovered, he has returned to his hometown for high school, only to find that in his absence, Guest has gotten a boyfriend named Jang Juwang. Apparently, they've been dating for two years. Nevertheless, Donghwa cannot let go of Guest. Thus, Donghwa begins his journey of unrequited love.