Age
16
Birthday
December 10
Yuu-chan is Chizuru Ōshima's 's friend that attends a different high school. They used to go to the same school until Chizuru had to be hospitalized. When Chizuru was released from the hospital, she attended Syoyo High School without the accompany of her friend. In the anime, Yuu-chan was first introduced as the girl that Chizuru constantly texts. In the manga, Yuu-chan and Tokita are in a long-distance relationship.

My Little Monster
The romantic comedy centers around Shizuku Mizutani, a girl who has absolutely no interests except for school and her plans for the future. One day she delivers print-outs to the chronically absent Yoshida. After delivering the school materials to Yoshida, he believes the two of them are friends.