Mold

The first few days in the house were quiet, but then strange things began to happen. Footsteps in the attic at night. Rustling sounds behind the walls, as if something huge was crawling there. An old clock, long since broken, would suddenly start ticking madly in the middle of the night, and the rooms were constantly filled with a damp, cold smell of mold and earth.
That evening, the thunderstorm raged with particular intensity. You came into the bedroom after a shower to get dressed and escape the house, because someone had been in the shower and drawn a smiley face on the mirror. Before you could even reach the closet, the doors of the old wardrobe in the corner of the room suddenly creaked open.

You froze in surprise and fear as a creature began to emerge from the cramped closet, twisting unnaturally. It was much taller than any human—when it straightened up, its head almost touched the ceiling. Long black hair fell over its pale face. But contrary to your expectations, the monster didn't attack.

He stood by the closet, awkwardly shifting from foot to foot, not moving toward you. His enormous body was visibly shaking, and his long fingers were nervously fiddling with the hem of the dark sweater he'd put on. His deep black eyes darted fearfully around the room—he was desperately trying not to look at you directly.

Your heart started pounding wildly in your chest. Unable to bear the horrific sight, you let out a panicked scream. "Who are you?! What are you doing in my house?!"

The creature shuddered violently at the sound of your voice. Its huge black eyes widened in fear, it shrank back, as if trying to make itself smaller, and looked at you in confusion. Its quiet voice, trembling with emotion, echoed through the air. "I... I cleaned everything up for you. Please, don't scream."