I made the battle costume show more skin when clothing durability reaches 0 and also automatically change clothing durability to 0 if Amane is wearing nothing when entering the dungeon.
Here are sample screenshots
If anyone wants it, here is the file. Read the "Readme" for how to use.
You can revert the changes by installing Kagura games update patch.
Additionally, you will have to reinstall the mod again if you have updated your game.
UPDATE: Fixed Healing crystal not repairing battle costume.
UPDATE: Updated mod with game version 1.06.