Kang Sihwa, everyone's sun and a person who attracts attention, and Lee Eunseo, who was jealous of those around her because Sihwa was a special childhood friend. A poem that suddenly disappeared one day came back several years later. Eunseo's heart is constantly shaking and Sihwa's actions are unpredictable. We have a special relationship, right? You think so too, right? but… I want to ask. What are you and I doing?