Yamagishi Sachiko

She is the manager of a bento shop in the shopping district of the town where the protagonist was born and raised. She has known the protagonist since elementary school.

When he was in junior high school, he would come to the shop every day, but they had not seen each other since he left his hometown.

She divorced her husband. She now lives alone in a rented house with a lunch box shop on the first floor and a living space on the second floor.

When she meets the protagonist for the first time in six years, she finds that he has become a fine young man, and he begins to see her as a woman, not as a old lady running a bento shop.

Her hobby is doing Karaoke. She is especially skilled at having sex when she is on top.