Movie 20 - Arashi o Yobu! Ora to Uchū no Princess

The Nohara family is abducted by aliens from an advanced civilization who claim that Himawari is a legendary princess who will save the solar system. Unaware of the consequences, Shinnosuke signs a contract that allows her to be raised in the alien world. This forces him and his parents to go on a desperate quest to bring her back.