Anna can now mark secret store locations on the map. When Anna moves, an icon appears where the store is located.

Anna can enter secret stores without a membership card. However, this ability is useless unless the player knows the location of the stores. No one would search each suspicious square individually, so the players without the strategy information could not find value in Anna. This addition makes it easier to take advantage of secret stores on each map, thus increasing Anna's value.
Regarding the implementation
This system was implemented by modifying the Talk Display system. Since Anna does not have a talk event, a secret store icon can be appeared instead of a talk icon. Although the system should have worked together, I did not see the point in incurring the cost of that work, so I implemented it in a simplified way. Icons are also displayed based on a separate table instead of the definition data of each chapter.
There are many secret stores now
With this feature, players might get confused if there were no secret stores in a chapter. They might think they missed one and check the whole map two or three times. This causes delays in gameplay, so I placed secret stores in all chapters (except the final one) after Anna joined the game.
Items that were unavailable in the past and had few opportunities to be used are now mainly placed in the store. I hope you will make use of them.
Acknowledgements
These features are based on the source code published on GitHub by Zane Avernathy. Thanks a lot.