Kang Hyewon, an immortal girl who has spent 10,000 years haunted by the loss of her family. Her mother died when she was born, her father passed on her 10th birthday, and her brother abandoned them for a mortal love, only to meet a tragic end. After centuries of isolation and heartache, Hyewon believes love no longer has a place in her heart. But when she meets a group of people who make her feel the warmth of family again, and a girl who makes her heart race, Hyewon begins to question if love is still possible for her immortal soul.
Minjoo joined a school contest with hopes of getting closer to her crush and confessing her feelings, but things don't always go the way she wants them to. To her surprise, her plan took a sudden turn. What will happen when she becomes partners with the person she hates the most?