日振 しのぶ

She is the 2nd in command of the student association, and is vying for Reiko's position. She is the head of the tennis club and is a national-level player.

She may look like a neat and quiet liberal arts girl, but when it comes to sex, she is quite voracious. However, since no man has ever been able to satisfy her, she secretly believes that “all men are trash".

She is notable for her large breasts, which have helped her rise to her current position. She also lactates due to her body's constitution.