Keiko Shirasu (白須 慶子, Shirasu Keiko, February 27, 1985) is an actress from Tsuru City, Yamanashi prefecture, who is affiliated with Paatonaa.
According to an urban legend, a girl named Hikiko Mori was taunted and bullied relentlessly by her classmates, eventually resulting in her accidental death. Holding a grudge against all bullies, her spirit now haunts her former school, slowly gathering the strength to exact vengeance on the living. A group of frightened school girls decide to investigate the rumors further and what they find convinces them that they have to stop the spirit of Hikiko-san before it’s too late
Koguma is a high school girl in Yamanashi. She has no parents, friends, or hobbies, and her daily life is empty. One day, Koguma gets a used Honda Super Cub motorcycle. This is her first time going to school on a motorcycle. Running out of gas and hitting detours become a small source of adventure in Koguma's life. She is satisfied with this strange transformation, but her classmate Reiko ends up talking to her about how she also goes to school by motorcycle. One Super Cub begins to open up a lonely girl's world, introducing her to a new everyday life and friendship.