Yasuo (Hiroshi Abe) grew up as an orphan. He married a woman he loved and they had a son Akira (later played by Takumi Kitamura). Yasuo's life seemed great at the time, but his life totally changed after his wife died in accident. Since that time, Yasuo, who never experienced parents' love himself, has to raise his son Akira alone. Based on novel "Tonbi" by Kiyoshi Shigematsu (published October 30, 2008 by Kadokawa Shoten Publishing Co., Ltd.).