Cthulhu Running Group Tour in Another World

Traveling to a steampunk world, Edwin became the grandson of a fallen nobleman I thought that all I inherited was a manor on the verge of collapse and a stupid debt. Until he found a black twenty-sided die among his grandfather's relics... Darkness swallows light, unspeakable monsters lurk in the shadows, and whispers ring in his ears... Well, actually that was the secret keeper trying to trick him. What does it mean that a secret keeper is also a dice girl? Why is there Cthulhu in another world? Regardless, Edwin realizes that he has been involved in a running team from which there is no way out. Since you can't quit, you have to stay rational and step into madness. (COC running group, with magic modification)