Staring out into a bathroom door, with the bed on your right, turn to your right and walk around the bed and exit the other doorway. Exiting the other doorway, you'll see a stairway on your right, go up the stairway. The first door on your left is a bedroom, walk into the bedroom. Staring at the two skateboards on the ground, below the guitar, with the white bed to your left, walk into the doorway on the right of the bed and the guitar. You'll see it's an empty closet, walk into the corner of the closet between the red painting and the brown storage container and you're done.