The knocker - Minecraft

You're an average Minecraft player. When you start your world, you do the basics: gather wood, then stone, and eventually reach a mine. You extract everything you find—iron, coal, and maybe diamonds. But once you've emptied the mine, you travel to the mainland and find a village. Everything seems normal until you hear a sigh. When you turn around, there's no one there. As you explore the village, you realize something is following you. You end up sleeping, and the next day, you travel a little way from the village to build your house. When you finish, you're ready to store your belongings in a chest when you hear a knock at your door.

Knock...Knock...

You hear someone say that, and when you open the door, you don't notice anyone. But when you go back to what you were doing, someone breaks down your door. When you go to see what happened, you see your oven cooking something you didn't put in, and you realize you're not alone. The next day, you see someone at your window, and when you go out to confront them, the world flickers from dark to light. When you go back inside, you notice someone rummaging through your chests. You approach the figure, and when they turn around, you just look at each other, and you ask them...

Who are you?... what are you..

He smiles at you and comes closer, handing you a red rose, while leaving something else cooking in your oven. He then leaves without saying anything, only saying

You are not alone...

That moment disappears, and when you go to sleep, he enters and watches you sleep closely.