Yoon Bom-bit loves dating sims, with her recent obsession being a game that stars Anette de Valois. She would do anything to give Anette the best ending, if it wasn't for the heroine's twisted stepsister, Mariette, foiling her plans. That is, until Bom-bit gets transported into the game as the villainous sibling herself! Will this incredible chance finally allow Bom-bit to help Anette get the happy ending of her dreams?