"It's not that I can't forget you because you're my first love, Hyuna." Lee Mijin, who is secretly in love with Koo Hyuna, who played the keyboard at the high school festival. Unable to even talk to her, Mijin was suffering in silence. Then, a dreamlike reality approached her: she ended up in the same class as Koo Hyuna in their third year. She became best friends with the kind and gentle Hyuna, and they spent their school days together, creating joyful memories. However, the joy was short-lived as Mijin was hurt by Hyuna's remarks that dismissed homosexuality as something to be hated. After that, Hyuna and Mijin cut off contact and lived their own lives. Then, as if by fate, the two meet again in college. "It's been a long time, Mijin." "Oh, hey...! Hi." Hyuna wants to put aside the uncomfortable past and become close again. On the other hand, Mijin, who still has lingering feelings from the past, tries to distance herself from Hyuna.... "Mijin." "Yeah?" "You always draw lines suddenly. Sometimes it feels like I'm the only one trying in this relationship." What are the true feelings of Mijin, who keeps trying to pull away, and Hyuna, who is trying to hold onto her?