Shuko Murao (村尾 修子 Murao Shūko) is much like Yuri, another "lone wolf." She is very beautiful but has a cold exterior that drives others away. Due to experiences in middle school, Shuko fails to trust girls. She has been in love with Tanaka-sensei, Kou's older brother, since her first year of high school after attending a guidance session between the two of them. Eventually, her trust in female relationships was restored after becoming friends with Futaba and Yuri.

Personality: Shuko was always very quiet, because she didn't have any friends and had no trust in girls. She kept to herself and built a "wall" between her and everyone else. After meeting Tanaka-Sensei at a teacher and student meeting, he encouraged her to become more friendly. After talking to him more and learning little things about him, she fell in love with him. Although her feelings for Tanaka-sensei didn't change, her attitude towards others, especially girls, changed after meeting Yoshioka and Yuri. Shuko gives Yuri and Yoshioka a lot of advice about their Kou problems due to the fact that she's the "neutral party," as well as comforts them when they're down. She's still pretty calm but way more talkative and nice around her two new friends, but can get a little irritated when Kou is giving Tanaka-Sensei a hard time.