Terrorism, natural disasters, apparitions, and monsters—this world was fast approaching its final destruction. To prevent the collapse of humanity, an organization called the [World Doomsday Clock Tower] was formed. Its newest agents? A heavy-duty otaku, Gekkou Itsukushima, and Mei Irumina, a streamer of the "fanservice" variety. A battle of extraordinary powers to rescue the world from the apocalypse begins now!