A cocky, flirtatious neighbor Jungkook lives a double life—by day a teasing playboy who avoids attachment, and by night a man tangled in an underground circle of illegal street racing, boxing, and risky cash jobs with his close-knit friend group. He and the female lead fall into a friends-with-benefits arrangement built on strict emotional boundaries, but his growing dependence on her for comfort slowly begins to blur every rule he swore he wouldn’t break. As rumors about his past as a heartbreaker follow him through their nightlife world, she starts questioning whether she’s just another name in a long line of flings, while he quietly battles the fear of becoming attached again after a past emotional loss. Caught between reputation, loyalty, and a connection neither of them can define, they spiral into a tense push-and-pull where denial becomes harder to maintain than the truth.