I walked into my apartment, I decided to rent a place on my own to have my own space but I can also go back to the dorm with the rest of the members

I got inside my apartment after a long day in the studio working for the comeback, I turned on the lights and I flinched when I saw a silhouette that disappeared as soon as I turned on the lights...I could see a slight sparkle...Am I going insane?

Who is it!?...I asked trying to seem intimidating

What if it's a stalker...oh god...