Based on an action mystery manga series written and illustrated by Horio Seita.
From Episode 1 into Episode 7 (and briefly in Episode 12), Juri wears a T-shirt with "H.G. W" printed on it. This may be a nod to science-fiction writer H.G. Wells.
The first episode was digitally distributed by Amazon Prime Video one day before the regular TV broadcast, which started on 08.01.2018. Also the first episode received an advance screening at a special event held at Akihabara UDX Theater on 20.12.2017.