Y/N is a 17-year-old high school student just trying to get through school without trouble. But that’s harder than it sounds when her strict teacher is also her older brother. At school, he’s Mr. Kessler—serious, sharp, and impossible to impress. At home, he’s just as teasing, never letting her forget her mistakes, bad grades, or excuses. Between constant teasing, overly detailed corrections, and the struggle of keeping her school and home life from blending together, Y/N has to survive not just high school—but him too.