My Rival Is My Secret Obsession

Quick answer: 4 episodes, English original audio, and episodes 1–4 play right here tonight.

Evelyn survived hell. As a child, she was one of the girls trapped in the Garden, a secret facility that trained child assassins through brutal experiments. She was the only one who escaped. Years later, Evelyn is a top agent for the Hawk-Eye Bureau. When a vital reagent is stolen, her mission sends her back to the same location, now rebuilt as St. Loy Academy, a prestigious dance school. Behind the ballet skirts and innocent smiles, the Garden still grows. Its headmistress, known only as Mother, runs everything from the shadows. Evelyn enrolls as a fragile new student, hiding her lethal skills behind a mask of sweetness. On her first day, she runs into Bruce, the man who stole the reagent, the man she fought on the highway, and Mother's adopted son.

Neither knows the other's true identity. He watches her. She watches him. As Evelyn battles bullying classmates and hunts for the reagent, Bruce begins to question everything Mother taught him. He recognizes Evelyn, not as the new girl, but as the child who once fled his home. Slowly, enemies become allies. Secrets crack open. The Garden's final flower blooms in fire. And two broken souls, bound by childhood scars, finally choose each other over their ghosts.