Kyuusei no Doomsday

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? Itsukushima Gekkou, a heavy-duty otaku, and Mei Irumina, a "fanservice" streamer. A battle of extraordinary powers to save the world from the apocalypse begins now! (Source: Akita Shoten, translated)