T.I.Y.
From Nookipedia, the Animal Crossing wiki
The T&T Home Center is the fourth expansion to Nookling's Junction appearing only in New Leaf. It combines the Garden Center with Nookway, merging into one big megastore. For it to expand even more, the player must complete all four of Gracie's Fashion checks, spend 100,000 Bells and play the game for 30 Days.