Move to the wall with the wooden door and enlarge the bracket of the wooden box placed on the lower left floor.

Use the wire brush on the dirty dial.

When the parchment is unfolded, an illustration appears.

If you compare the place of 1, 2, 3 and 4 in the drawing listed in the parchment with alphabet of dial of the wooden box and pick it up by number, it will be SNOW. If you enlarge the book , there is an entrance of input, and you input SNOW above.

Open the book and turn a few pages to get the key.

Enlarge the lock of the wooden door.

Use the key to unlock the door.

Open the wooden door. NORMAL END results if you go outside directly.
※You can start all over again from the previous step without the saved data disappearing.