Chika has been married to her husband for over 15 years, but has been sexless for over three years. They have not been blessed with children, and she feels a little lonely going back and forth between her home and her part-time job every day. One day, she meets a man named Osawa who has moved in next door. Chika develops feelings for Osawa, who tells her with a serious look in his eyes that he is attending a preparatory school to become a lawyer. Then, the two of them start a relationship after a certain incident.