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
Shattered Angels
TV
24m
Mission-E
TV
24m
Clockwork Planet
TV
24m
Karasu Tengu Kabuto
TV
25m
Kämpfer
TV
24m
Goku: Midnight Eye
OVA
50m
One Pound Gospel
OVA
50m
Monster Strike
TV
8m
Power Stone
TV
20m
Project A-ko: Love & Robots
OVA
53m
Ragnarok the Animation
TV
24m
Shounan Bakusouzoku
OVA
52m
Phantom Quest Corp.
OVA
30m
Nozo x Kimi
OVA
23m