正体(しょうたい)が鶴(つる)だと見(み)られたから

When the wife came out of the room, she had a sad face. She said, 'I am the crane that you saved. Since you have seen my true identity, I can no longer stay here.' The wife, turned back into a crane, flew away into the sky while crying. Yohei wept as he stared at the sky forever.