Itou Chihiro, the best friend and childhood friend of Hikaru, is secretly in love with him. After Hikaru started dating Hoshino Sayaka, she tries to support them and to forget her one sided love for Hikaru with Shinobu's help. She promises Shinobu to go to the same high school with him and to go out with him but suddenly chose another high school to comfort Hikaru after Sayaka disappeared.