Watarase Yuumi

Yuumi is the secretary of the student council. She's very pretty and is always sexually harassed by the president of the council, Kotoko, who really likes the softness of her breasts.

She is a pretty traditional girl, very polite and has very good manners. She is considered as the second prettiest girl of the academy, right after Aya-sensei.

She's very shy with boys, and finds it very difficult to talk with them because she suffers from androphobia.

Although she is shy and is afraid of boys and has never given her "ring" to another, she has on her arm a beautiful collection of "rings" she received as proof of confession.

She knows Yuuki because of his "incident" with Aya-sensei.

Spoiler

Yuumi's androphobia dates back a long time and finds its origin in her childhood. Ten years ago, Yuumi wore short hair and put loose clothes to run and climb trees.
All the boys made fun of her and stopped playing with her because she was, for them, all but not a girl.

The only one who never made fun of her and who continued to play with her until she moved with her parents to another city was Yuuki. At that time, she was secretly in love with him.

She is also a childhood friend of Aya, whom she considers as her big sister.