Hibino is an attractive young woman who attends the same university as Kyōhei, who has a longtime crush on her, but is unaware of her own feelings for him. She is asked out on dates by many of her male classmates, but declines all of them, and eventually becomes Kyōhei's girlfriend. Despite her father coming from the same village as Kyōhei's family, she doesn't know about its secrets until she invites Kyōhei (whose apartment is destroyed) and Utao to live with her and her father. According to Aki, Kyōhei's affection for her comes from Hibino's resemblance with a certain teacher from their childhood.