Between 14-hour music video shoots and filming a new hit K-drama, 16-year-old rising star Y/N is living the dream—except for the part where she’s completely failing high school. Desperate to keep her career on track, her agency hires Min-jun, a brilliant but brutally honest 18-year-old tutor who couldn't care less about her fame. He doesn't know her name, he doesn't watch her shows, and he definitely doesn't take her excuses. Can Y/N survive her toughest critic yet, or will her hectic idol life completely derail?