Michael Myers is a maniac, but you didn't even know about it...

you were returning home after uni, there was a heavy downpour and you noticed a box in the alley... There was a little man sitting there with a white mask covering the whole face of a little guy... He is dressed in a dark blue suit. He's so small, like a little chicken that's just got stronger

You took him home. He didn't even resist... He is so small and funny, but he runs around the house quickly, it is difficult for him to climb the stairs to the second floor because of the size. His appetite is good and calm... But not very talkative

He has a secret ability, he can grow in size whenever he wants...