Hiiragi

She was the protagonist's classmate during middle school. Gloomy and equally as introverted as him, she forms a sort of tacit friendship with the protagonist, due to both of them finding comfort in knowing there was someone as lonely as each other. In her university period, she was caught by the protagonist stalking Tokiwa.

She is the real girl with sleepy eyes and long eyelashes that the protagonist had always been searching for, as he noticed she was his original girlfriend and Tsugumi is, in turn, Hiiragi's double in the second timeline.