This is the first time that Ryoko Yonekura has starred in an NTV drama, and it is also her first time playing a high school student. A 35-year-old female high school student, Ayako Baba (played by Ryoko Yonekura), who is twice as old as her 17-year-old classmate, was suddenly assigned to the new school year. When classmates were discussing whether she was the mother of a classmate, Ayako said in a calm tone, "Yes, I am a third-year high school student," which attracted suspicious looks from all around. This 35-year-old female high school student went to school with ordinary 17-year-old high school students, went to smoke during breaks, and drank canned beer after school, doing her own thing without caring about the feelings of others. Faced with bullying problems in school, she would not report it directly to the teacher, but taught these bad students a lesson in her own unique way. Ayako's actions caused her class teacher Junichi Koizumi (played by Junpei Mizobata) a headache. What kind of exciting drama will this 35-year-old female high school student perform in school?