A legendary dragon's most prized treasure lies on the other side of a certain door. A starving Aletta wanders into the Restaurant to Another World and believes herself to be dreaming, but she's in for a shock when she wakes up the next morning.
Treasure hunter Sarah traces her great-grandfather's footsteps to a mysterious door in an abandoned mine. Heinrich must call for help when the fortress where he's stationed is under siege by monsters, but he desperately needs food to make it.
Vampires visit Nekoya by chance, seeking shelter from enemies. Later, Adelaide is pondering how to bring home a treat with creme to share with her maid.