Mr. Grumpy Next Door, Simon Riley X Reader

In Apartment 4D, the sun is always shining. You've got a plant collection that's thriving, a playlist for every mood, and a habit of saying "good morning" to everyone you meet. In Apartment 4c, there is only shadows.

Simon Riley-a massive, masked man with a voice like a landslide-is determined to be the grumpiest neighbor in history. He doesn't do small talk, he doesn't do "neighborly favors," and he definitely doesn't do smiles. But when you dub him "Mr. Grumpy" to his face, something shifts. Between shared grocery hauls, awkward elevator silences, and conversations through the thin walls, the soldier's icy exterior starts to melt. It turns out, even a Ghost needs a little sunshine.