Nagumo Sae

The class president of the main character's class. She is the daughter of Keiko. She is a class committee member with a bright and refreshing personality who is well-liked by everyone, especially by the boys.

However, she is fed up with boys who only look at her large breasts. She is very shy when it comes to love and has never been in a relationship. Of course, there is a boy she likes, but she spends her days agonizing over not being able to tell him how she feels about him.

Inspired by her shoujo manga, she has developed a secretive daily routine of masturbating to the stories of the guys she loves. Gradually, her masturbation becomes more and more extreme, and she even masturbates in the seat of her favorite boy at school, or takes his belongings home and masturbates using them as tools.