The Soul Translator is a state-of-the-art full-dive interface which interacts with the user's Fluctlight—the technological equivalent of a human soul—and fundamentally differs from the orthodox method of sending signals to the brain. The private institute Rath aims to perfect their creation by enlisting the aid of Sword Art Online survivor Kazuto Kirigaya. He works there as a part-time employee to test the system's capabilities in the Underworld: the fantastical realm generated by the Soul Translator. As per the confidentiality contract, any memories created by the machine in the virtual world are wiped upon returning to the real world. Kazuto can only vaguely recall a single name, Alice, which provokes a sense of unease when mentioned in reality.
When Kazuto escorts Asuna Yuuki home one evening, they chance upon a familiar foe. Kazuto is mortally wounded in the ensuing fight and loses consciousness. When he comes to, he discovers that he has made a full-dive into the Underworld with seemingly no way to escape. He sets off on a quest, seeking a way back to the physical world once again.
[Written by MAL Rewrite]+ More
More Seasons
Characters & Voice Actors

Eugeo
Main
Zuberg, Alice
Main
Aki, Natsuki
Supporting
Arabel, Ronie
Supporting
Asada, Shino
Supporting
Ayano, Keiko
Supporting
Bercouli Synthesis One
Supporting
Cardinal
Supporting
Casals, Vassago
SupportingRecommended for you
The Buried Tree Devil
ONA
23m
D_Cide Traumerei
TV
24m
Kyoukai Senki
TV
24m
Scarlet Nexus
TV
24m
The Quintessential Quintuplets: The Movie
Movie
136m
Memory of Chang'an 2nd Season
ONA
15m
Mazica Party
TV
24m
The Journey
Movie
109m
Black Clover: Sword of the Wizard King
Movie
110m
Beyblade Burst Dynamite Battle
ONA
12m
Dr. Stone: New World
TV
23m
The Case Study of Vanitas
TV
24m