I got every costume I could find but one grey square in the bunny manor. I have no idea what it could be. Its the one to the right of Mary's zombi retreat outfit. Is that costume currently in the latest build or for one that's coming in the future? Also I hope in the future there will a few more scenes for some of the girls that didn't have much or nothing to begin with like the pink orc? girl in the haunted forest, loki, or the dancing girl in the tavern (says along the lines of looking for a good time but nothing comes of it), Nyx, or the both fairies/giant fairy in the town caves, etc.
Edit: Nvm I figured out where to get the new costume. Talk to Akane after beating the main story.