"Rin" stands on the podium at a certain school in Tokyo.Serious and beautiful, she is a popular teacher with both her students and her fellow teachers.She is "Rin", but she is troubled by the behavior of the delinquent students in the class she serves as her assistant homeroom teacher.The students "Suzuki" and "Kameda" proudly smoke inside the school and bully the cleaning staff. "Rin" didn't listen at all even if "Rin" warned him, and "Rin" was at a loss.One day, he is suddenly called by "Suzuki" and believes in the words "We regretted it... I want you to listen to what we have to say", and goes to the designated place to listen to them. ” was waiting for ….