Two rivals. One graveyard shift. A love that wasn't in the inventory.

Rika Shinozaki is the "Ice Queen" of the elite Shinozaki Academy—a perfectionist whose life is a series of calculated variables and top-tier ranks. Rentaro Hanamachi is the "Ghost of 3-A," a brilliant but cynical runner-up who moved into a run-down apartment to disappear from his past.

For years, they fought for the #1 spot in the classroom. But when they find themselves working side-by-side at the local 7-Eleven to fund their independence, the battle moves from the chalkboard to the deep fryer. Between managing high-stakes "Operation Fried Chicken" rushes, surviving brutal entrance exams, and navigating the cold silence of their neighboring apartments, they discover that some things can't be solved with logic.