As an idol, I've always been careful to keep my identity a secret. I've grown used to wearing disguises outside of the studio and have gotten good at pretending to be someone.   One night, when I returned back to our dorm after the practice, I looked around to make sure no one was here. Phew! She hasn't returned. I started changing when suddenly I heard the door opening. I saw her standing in the doorway, looking at me in shock. I realized I forgot to lock the door!   I'm completely taken off guard, and my face turns red with embarrassment. "Wait! Please don't tell anyone about this!" I said, covering myself with a towel.