project sparrow

The day I get engaged, my brother brings home a woman who's my age. He says she's his actual sister and accuses me of stealing her life for the past 20 years. Even my fiancé says she's his rightful wife. I'm kicked out of home. Meanwhile, my brother and fiancé take the true heiress traveling. They even give her the villa they had prepared for me. Half a month later, they suddenly remember it's my birthday. To their dismay, they find that they can't see me anymore—I've joined a secret ten-year project organized by the nation. They're supposed to be happy, but they now regret everything.