Eunseo, a shy and timid student, was reluctant to enroll in the exclusive Stella Academy of the Arts. She anticipated a competitive environment filled with isolation and loneliness. To her surprise, Ina, a free-spirited classmate, takes a sudden interest in Eunseo. They bond over secret conversations on the rooftop after class, and Eunseo's admiration for Ina develops into something more profound. Ina reciprocates Eunseo's affection, but her infatuation appears to grow into a dark obsession. As Eunseo uncovers the root of Ina's enigmatic love, what will become of their relationship?