I have redesigned the structure of XY (KW-18), which was originally released in 2013. The overall size of the piece has been reduced from 86mm cubed to 70mm cubed, and the storage space from 42mm cubed to 39mm cubed. Additionally, by adding an inner lid, the opening has become significantly wider, making it much easier to store items without inconvenience. The strength of the dummy mechanism has also been greatly improved, but the piece is still delicate overall, so please do not apply excessive force.