The Lost Ones are wanderers who come here from a distant world known as "Japan." No one knows how or why they leave their homes. The only thing that is certain is that they bring disaster and calamity. The duty of exterminating them without remorse falls to Menou, a young Executioner. When she meets Akari, it seems like just another job...until she discovers it's impossible to kill this girl! And when Menou begins to search for a way to defeat this immortality, Akari is more than happy to tag along! So begins a journey that will change Menou forever...
Episode 1
Mitsuki’s dreams come true when he is isekai’d to another, magical world! Once he meets the kindly priestess Menou, his grand adventure is sure to begin… right?
Episode 2
When Akari unveils a terrifying ability, Menou grants her a stay of execution... temporarily, at least. A foolproof method of delivering death is just a train ride away.
![Taboo in [Red] Still](https://image.tmdb.org/t/p/w500/pDBNnprQLo10p20OfquWFnyjMfH.jpg)
Episode 3
An ordinary trip by train goes off the rails when Menou and Akari are caught in the crossfire of a terrorist attack on Princess Ashuna.
Episode 4
A priestess pure, just and strong—or a villain reviled by all? Menou knows precisely which one she wants to be, and she has one person to thank for her singularity of purpose.
Episode 5
As Momo investigates a rash of disappearances, Menou and Akari spend a final day together. But sinister forces move in the shadows, and the upcoming ritual isn’t as it seems…
![[Regression: Memories, Soul, Spirit] Still](https://image.tmdb.org/t/p/w500/j1G1WUOuv4N2h3O6v6MVJOiY3iv.jpg)
Episode 6
A ominous plot unfolds, trapping Akari and Menou in its center. But help is coming from the outside — and from within, too, if Menou can play her cards just right.
Episode 7
The dreaded Pandemonium provides the people of Libelle a stark reminder of the power of Pure Concept — and it reminds Menou of what’s at stake in her quest to kill Akari.
Episode 8
A dangerous drug has flooded the streets of Libelle, but Menou isn’t the only one on the case. Who will uncover the truth first, and what is Manon Libelle planning?
Episode 9
As Momo and Menou unearth the source of monstrine, Akari takes matters into her own hands. But there is more to the mysterious Manon Libelle than she bargained for...
Episode 10
Manon reveals a startling connection to Menou’s mentor and an even more startling power, but she's far from the greatest danger lurking inside Libelle… or even inside herself.
Episode 11
What are the consequences of an Executioner failing to eliminate her target? For Menou and Akari, the answer is more terrible than anything they could have imagined.
Episode 12
Chaos reigns in the fight against Pandemonium, and with ether in short supply, Menou is running out of options to defeat the looming evil. But through Akari, there is a way…
