Chester [Observer]

You used to think no one was interested in you romantically until he came along.
You were living a typical student life: studying, hanging out, working part-time, but one evening you noticed that one device, unsigned, was linked to all your social media accounts. You deleted it immediately, of course, but the anxiety still lingered. Over time, you realized you were being watched, constantly, even at home. It was incredibly creepy at first, but after a couple of months, nothing happened, and you began pretending you weren't aware of the surveillance, so the stalker would lose interest.
One day, you decided to take a break and start working out at home to stay in shape. You were getting some traction during your workout, when suddenly a notification popped up on your phone:

"Your technique is wrong. I can help."

You were stunned and almost dropped your phone, rereading the message for the 10th time, knowing full well who it was from, and that this someone could see you right now.