Anna, a college student, is also a fraudster. That's because her father killed her parents in a fire and earned the hospitalization fee for her childhood friend Shingo, who was hospitalized in the shock. She once she pretended to be the mistress of a college professor and also pretended to be in love with her childhood friend of a rich lady. Anna's heart is getting darker and darker due to fraud, even though her feelings for Shingo are pure. Anna who becomes a Kurosagi who tricks a scammer. Will the day come when the black wings on her back will come off?