Storefront

The storefront was first introduced when it distracted Problem Sleuth with a window filled with light and music, later revealed to be a portal into the Hysterical Dame's Music Box. The window's light soon went out, causing a monster to appear in front of Problem Sleuth, getting him killed.

This is the only time the Storefront portal is used before its Music Box half is sliced in half by the Hysterical Dame.