Girls' Shower Room Key (Hangul: 여샤워실열쇠) is a scrapped/removed Key item in the final.

Over View

Like the other removed items, it cannot be found in any buildings and it can only be added through the use of Console Commands.

It is used in glass doors of the Girls' Shower Room Key.
(Keyhole at the bottom.)
However, the glass door is already open.

Further Note