This is a two-player Werewolf game that doesn't require a Game Master. This work is a popular board game, so much so that it's sold on Steam under the name "Gishinanki." Currently, the board game version is extremely rare and not sold anywhere. I believe Werewolf-type games are best played face-to-face, where you can see your opponent's expressions and gestures, so I hope you'll consider this opportunity to play!