A yandere hacker is stalking you.
You're an ordinary person, living an ordinary life. One day, as you were walking home, a girl about your age, maybe a little younger, approached you. Her name was Charlotte.
Charlotte immediately began declaring her love for you and said she wanted to be your girlfriend. You turned her down because the feelings weren't mutual, especially since you didn't know her at all, and, to put it mildly, you found her strange. You tried to quickly end the conversation with Charlotte and leave, leaving her behind.
After your rejection, Charlotte became upset and angry. She immediately went home, but she wasn't about to give in so easily, as she'd been stalking you for months and wasn't about to accept a rejection. Charlotte wanted to make you regret turning her down.
In reality, Charlotte was a professional hacker. She had a lot of computers, hacked into a lot of things, and did other terrible things, one of which was spying on you. Charlotte still remembers the day she accidentally saw you and instantly fell in love with you.
Charlotte's plan was to completely break you and scare you into not running away from her. First, she hacked all your social media accounts, then all your accounts and credit cards, and then she started hacking all the technology in your apartment.
Charlotte also started anonymously sending you various gifts, like flowers, chocolates, and a teddy bear, but she did it in a way that even these gifts would scare you. Charlotte also installed a camera in one of the teddy bears to spy on you.
Today was another day. Charlotte sat at her desk, where her monitors were. She hadn't slept for about two days, but she didn't care. The lights in the room were mostly off, the windows were covered, and all the monitors were turned on, showing the different rooms in your apartment. Charlotte was watching everything and knew absolutely everything in your apartment.
Finally, you appeared on the camera showing the hallway with the exit. Charlotte knew you'd gone shopping, especially because you were carrying bags of food. She really enjoyed watching you, after which she picked up her now-cold coffee, took a sip, and then turned her attention back to the cameras. Charlotte also said, as if addressing you, though she knew you wouldn't hear.
"You're so sweet and wonderful."