In the year 20XX, the Vtuber culture that was all the rage in Japan has also become a big hit in the demon world. Demons use avatars to hide their real identities, and while streaming in the human world, they steal the ‘souls’ from their subscribers bit by bit. Tsukishiro Aruca is a total newbie among these demon Vtubers… and she has only reached double-digit subscribers. But, her dream is to become a great demon Vtuber! So, how will it go ... ?!