For the thirty-year-old sister, when she returns to being single, is she lonely rock climbing or the spiral staircase of happiness? When the unknown world comes, is it her eighteenth-year-old brother or her eighty-year-old grandfather who is waiting for her? Is money dung or treasure? Is love a sweet cake or a poisonous crane crown? Maybe exchanging identities with cats can start a new life...
Purpose: Happiness comes from hard work