It's a series of videos with Marisa and Reimu playing a Cthulhu mythos RPG (Alice is the DM), narrated with the usual yukkuri voices. Marisa Carnby and Kureha Reimu are their characters. The tag should probably be changed since "カーンビー" is a pretty clear reference to Edward Carnby in-context?
The two other NPC characters in there are Mami Sealock (CEO of Sealock Real Estate and the client in the case the two are working on) and Aya Shootcrow (reporter at the Boston Globe).
The two other NPC characters in there are Mami Sealock (CEO of Sealock Real Estate and the client in the case the two are working on) and Aya Shootcrow (reporter at the Boston Globe).