When the lock is hidden, the key becomes a connection between illusion and reality. When its role and function are blurred with the change of the key itself, the unknown completes the imagination. The curiosity and conjecture behind the key accumulates and expands, and when it is on the verge of some critical point, the key and the fantasy behind it collage a disorderly and ambiguous space. When the key touches the skin, the self-choice of belonging is completed. The key takes the form of a pathway, in approaching some purpose or result, as the dimension of all things.