Young wife raped by her teacher

One day, Yui, who has become a married woman seven years after graduating from high school, receives a letter from her high school homeroom teacher, Sasaki. Yui decides to go to her alma mater with her husband after receiving a letter from Sasaki, her favorite teacher. She meets Sasaki again in a classroom full of memories, but something happens that causes her to remember the rape incident from her student days that she had kept deep within her heart... At that time, Yui happens to meet her classmate Hayashi and learns the unknown truth about her teacher and the truth about rape...