widow of tears

Reiko, who lost her high school teacher husband, sheds tears of sadness at the wake as she remembered the secret she had hidden from her husband. It was a mistake she made only once with her husband's student, Aso. That night, Reiko, who stayed until the end of the wake, spoke kind words to Aso, and in an effort to escape her sadness, Reiko finds herself in contact with Aso again. Later, Reiko was told by another student, ``The teacher was worried that his wife was having an affair.'' What is the fate of the widow who is burdened with a sin that can never be redeemed...!? ?