Yoonjin rejects Haekyung's sudden confession of love that she met in the 'Youth Writing Class.' However, Youngji, a writing teacher, suggests them to collaborate to write until the next class. Yoonjin and Haekyung, who unexpectedly became a team, say they each want to write about ‘Apocalypse’ and ‘Love.’ However, differences in opinions are rarely narrowed, and the conversation eventually leads to a fierce battle.