THE UNKNOWN SOUND

It will be 12 o'clock last night

 After all my work

 I was very tired

 There was a new place and a new house

 No one was friends

 No one was with me

 After all, I fell asleep after work

 It will be about an hour before I go to bed

 If there was anything in the eye

 So that's just sleep and sleep

 No one was in the mood

 No one else is dreaming

 Suddenly there was a noise

 Maybe the sound was knocking on the door

 But I go and open the door and see

 No one was there!