"Be my scapegoat!" is what Rosie's twin sister said to her, begging her to act out a marriage with a man in order to make her boyfriend jealous. The fake fiancé was Morgan Urquart, a stunning, handsome man, who had a need to wed within six months to gain management rights to his company. With the understanding that this is merely a marriage based on contract, Rosie feels relieved, but at the same time starts to feel sweet, heartrending sorrow. Rosie tries to hide her discomposure while trying hard to act as her twin sister, but Morgan detects that she is a scapegoat...!?