Minho's sweet and stubborn sister, Eun Ah, came from the states to S. Korea to live with him. Problem? He forgot to mention to Eun Ah that he lives with s and that they think Minho's sister, is actually his brother. What can Eun Ah do, but disgiuse herself as a guy and stay with the other members and Minho. All she wants to do is survive her stay with no drama and her secret well kept, but what if the members all start to like Minho's sister, wether they know her secret or not? Over-protective Minho will have to go at everything to keep s as far away as possible from his sister. How will Eun Ah's stay with the SHINee members be like?