Akatsuki Iride, a cheerful Let's Play streamer known for escape games, vanishes after starting a free game called The Ones Within and wakes in a strange world with seven other young streamers. A masked figure in an alpaca head named Paca lays out the rules: clear stages where the danger is real and rack up a hundred million views between them to earn a way out. Akatsuki, Karin Sarayashiki, and the rest have to keep their channels climbing or keep playing.