At YG Academy, the most prestigious high school in the city, life is supposed to be about grades, gossip, and graduation. But for Ruka, Rora, Rami, and Chiquita, the final bell is just the beginning of their "real" day. By night, they are The North Star, a group of masked vigilantes protecting the streets from "The Glitch," a mysterious digital virus turning ordinary citizens into chaotic monsters. By day, they are just four students struggling to hide their bruises under oversized hoodies and their exhaustion behind energy drinks. The only problem? Their crushes are the ones tasked with catching them. Pharita, Asa, Ahyeon, and Hyein make up the Academy's Student Safety Committee (SSC). They are brilliant, observant, and increasingly suspicious of why their best friends always seem to disappear right when the sirens start blaring. As "The Glitch" grows stronger, the secrets start to crumble. Between accidental power slips in the cafeteria, late-night rooftop encounters, and the intimate silence of cleaning wounds in the school infirmary, the girls of The North Star find themselves in a dangerous dance. The mission is simple: Save the city. Don't get caught. But in a world of masks and mysteries, falling in love is the most "off the record" move they could make.

Kawai Ruka doesn't do "feelings." She does mergers, acquisitions, and bottom lines. But when her grandfather's will places a billion-dollar inheritance behind the requirement of a "stable marriage," Ruka finds herself facing a deal she can't negotiate her way out of. She needs a wife who is elegant, believable, and most importantly, controllable. Pharita Chaikong is the perfect candidate. Poised, soft-spoken, and desperate to save her family's crumbling legacy, she agrees to the unthinkable: three hundred and sixty-five days of playing the devoted spouse to the coldest woman in Seoul. The rules are simple: No private intimacy. No genuine emotional attachment. Never break character in public. But as the camera flashes fade and the penthouse doors close, the silence between them starts to feel heavy. Between the shared morning coffees, the staged touches that linger a second too long, and the secrets hidden behind Ruka's icy exterior, the lines of the contract begin to blur. Pharita was supposed to be a business transaction. Ruka was supposed to be a paycheck. But in the quiet moments after midnight, they're both starting to realize that some things, like the way your heart races when a lie starts feeling like the truth, can't be written into a contract. How do you survive a year of "I do" when you both know it's "I don't"?

At YG Academy, an invisible line divides the student body: the elite, rule-abiding Student Council and the popular, troublemaking Basketball Team. When Council President Pharita is forced to collaborate with Basketball Captain Ruka on a high-stakes school gala, the resulting bickering masks a dangerous, hidden chemistry. But the clash between their warring factions is only the beginning. Behind the scenes, other students are navigating secret loves, slow-burn rivalries, and internal struggles. As the rivalry between the two groups reaches its peak, the arrival of a serious external threat will force everyone to decide whether they are better off fighting each other or fighting together.