Hololive, an agency filled with people who streams almost every day and exist in different generations. They're also an Idol Group that's similar to AKB48. In fact, their goal as Idols is to make people happy and entertained while being supported at the same time. They share the same bond of friendship and love as well.

It wasn't long until something unexpected had happened. A cloud of black smoke suddenly emerged around the entire building of the Hololive Agency. As a result, the people there got corrupted and started killing those who weren't yet taken over by the corruption.

They weren't the only agency that had been taken over by the corrupted. It also took over the Nijisanji company and Tsukudani Norio Productions

After the 4th Generation of Hololive escaped, they met someone who wasn't from their world, and somehow, they met an unknown agency that they haven't heard of before.

Now their purpose is to eliminate the corruption controlling their senpai's and kouhai's and figure out who was behind this mass chaos.