Rio Sasaoka (Erika Ikuta) is a high school teacher of Generation Z.She overcame her parents' opposition and realized her dream of becoming a teacher. However, the cruel reality made her consider resigning in her second year of teaching, and she was under tremendous pressure every day.

At this time, a student stole.The dean of academic affairs, Nakahiro Katsuhiro (Shingo Yanagisawa), did not want to be involved and named Li Yang to deal with it. Li Yang was forced to pick up a student she did not know.

After Rio was sarcastically scolded by the victim shop owner (Shibata Rie), on the way home, she was begged by a student to eat sushi, but she ended up eating high-end sushi with 12,000 yen from her own pocket.

Li Yang usually likes to post complaints on a small account on SNS, complaining that there are too many other things to do besides going to class.Another way to relieve stress is to talk to your boyfriend Seiya Otomo (Yuta Oseki) who is willing to listen to everything to get through each day.

However, her patience has its limits.Finally, she decided to resign and knocked on the principal's office door.However, the principal Yoko Yamashiro (Hisako Manda) proposed to her that due to the shortage of teachers, she hoped that she would serve as the class teacher of Class C of the third grade of high school from the new semester...!?This is an offer you absolutely cannot refuse!!