Iren entered the Sol family when she was a baby as a result of unknown mysterious incident. Nevertheless she's happy and almost content with life. "Almost" - because of the elder freeloader-sister Neira, who deceided to wait for a prince to slove all her problems. Because of this, Iren has to work hard to help provide for her family. But after witnessing something, she decides to help make her sister's dream come true. In order to do this, she has to say goodbye to her beloved family and home.