The Netherworld Edit Shop is unlocked upon starting this episode, which lets you edit the interior and exterior of the Pocket Netherworld to your liking. This includes moving around the various NPCs, so you could have all of the ones you use right next to the Dimensional Prinny for easy convenience. Only two new Quests will unlock, one of which allows you to recruit the Dragon Overlord if you complete the battle, and the other will unlock Nine-Tails monster class.
You can find the free chests at the following locations:
- On the stairs right by the Interrogation Room
- By the Data and Memories NPCs
- Next to one of the beds behind the Hospital NPC (will need to turn camera to see it)