Hibari's Circus: The Sad Little Dove

ひばりのサーカス 悲しき小鳩

Also known as Hibari no sakasu: Kanashiki kobato

Mariko studies at a missionary school in Shinshu. She drops out of school and joins her father on a circus tour when she discovers that her father, Ryutaro, whom she always thought was an agricultural and forestry engineer, was a circus clown. Over time, Mariko's singing attracted the attention of the public.