Quinn's parents divorced when she was young, and her father, in order to pay off gambling debts, sold her virginity. However, she found out about this in advance and, to prevent her father from succeeding, she had a one-night stand with a handsome guy (Justin) at a bar. Subsequently, her father died in a drunk driving accident, and the protagonist had no choice but to seek out her mother, who had remarried into a wealthy family. To her surprise, her stepbrother turned out to be the same guy she had a one-night stand with......