Aoi Yūki : Kayo Hinazuki
Shinnosuke Mitsushima : Satoru Fujinuma (29-years-old)
Tao Tsuchiya : Satoru Fujinuma (10-years-old)

Akari Kitō : Hiromi
Ayaka Nan:e : Osamu
Chinatsu Ak:aki : Airi Katagiri
Minami Takayama : Sachiko Fujinuma
Mitsuru Miyamoto : Manabu Yatsushiro
Takahiro Mizushima : Jun Shiratori
Yō Taichi : Kenya
Yukitoshi Kikuchi : Kazu

Akemi Okamura : Kayo's mother
Asami Yoshida : Hamada (eps 3-4)
Eiji Takeuchi : Takah:hi (ep 1)
Hideaki Tezuka : Jun's father (ep 3)
Hina Kino : Misato

Akari Kitō (ep 1)
Ami Naitō (eps 2-4)
Ayaka Asai (eps 1-4)
Ayaka Kaneko (eps 2-4)
Chie Horikoshi (ep 1)
Chihiro Maki (ep 2)
Kanehira Yamamoto (ep 1)
Sara Matsumoto (ep 2)
Shinya Takah:hi (ep 3)
Yūsuke Suda (ep 1)