The Storefront was first introduced in the imaginary universe when it distractedMspa icon 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 appearMspa icon in front of Problem Sleuth, getting him killedMspa icon.

Later, Ace Dick used the Storefront Portal to avoid falling to his deathMspa icon, which consequentially shrank himMspa icon due to the size-warping capabilities of window portals.

The Music Box half was then sliced in halfMspa icon by the Hysterical Dame, never to be used again.