Nanaka Yatsushiro  

, 八代 菜々香

The main character in the series is Nanaka, one of Sanas friends. Initially, it appeared that Nanaka had feelings for Sana. However, when Sana returned to town after five years, her personality underwent a significant transformation from being warm and compassionate to becoming cold and moody. Upon meeting Sana again following his return, she slapped him, seemingly upset that he did not recognize who she was. Despite this, it seems Nanaka still harbors romantic feelings towards Sana, as evidenced by her jealousy whenever he is with other girls, particularly Asami.