High school sophomore Noda Marisa was skipping school with her two friends when suddenly, she and her friends found themselves locked in a strange room.

The three were confused and arguing, but the situation worsens with the sudden appearance of Kidou Kokoa---a Vtuber who calls herself a "killer-type"---who announces that she is going to conduct a livestream.

However, said livestream would involve her executing her guests in a cruel manner.

Marisa and the other two are appalled by the outrageous content of the stream, and try to find a way to escape death...

[Translated from Booth]