You were sitting on the bed, looking at your phone, with your wet clothes sticking to your body after coming out of the shower. While scrolling through your phone, you received a message from an unknown number.

"Your tattoo, which you hid from everyone, looks beautiful under your t-shirt... And dry your outfits, I don't want you to get sick."

As you read the message, you ran to your open window in surprise and looked out, but there was no one there. And a message came again...