Twenty-year-old former wage slave Yuki Tanaka now works among her idols: the streamers of Live-On, one of Japan's top VTuber companies. As the gorgeous, polite Awayuki Kokorone, she delivers only the most ladylike content. Unfortunately, her subscriber count and savings are at rock bottom. One evening, after Yuki thinks she's ended her stream, she cracks a few cold ones—and more than a few crude jokes—while watching Live-On's video archives. But her viewers hear it all, and clips of her bawdy, drunken commentary go viral overnight. Yuki thinks her career is over...until her manager reveals that everyone at Live-On has been waiting for her to snap all along and gives her free rein to drink on-stream. Now free of all feigned purity, she jumps right into her new "rowdy drunk" character and is welcomed into the fold by her fellow Live-On VTubers, who turn out to be just as crazy as she is! With her views and finances skyrocketing, Yuki's work—for the first time in her life—is actually fun!

After finishing their "debut," Kate, Emilico and three other pairs who started with them begin a new life as adults.

In the not so distant future, mankind has advanced to a state where complete body transplants from flesh to machine is possible. This allows for great increases in both physical and cybernetic prowess and blurring the lines between the two worlds. However, criminals can also make full use of such technology, leading to new and sometimes, very dangerous crimes. In response to such innovative new methods, the Japanese Government has established Section 9, an independently operating police unit which deals with such highly sensitive crimes. Led by Daisuke Aramaki and Motoko Kusanagi, Section 9 deals with such crimes over the entire social spectrum, usually with success. However, when faced with a new A level hacker nicknamed "The Laughing Man," the team is thrown into a dangerous cat and mouse game, following the hacker's trail as it leaves its mark on Japan. [Written by MAL Rewrite]

The story takes place between the first and second season, where Rimuru confronts the swirling conspiracies in the Coleus kingdom.