Demon Slayer Watch Party: That, Uh, Great Adventure of Tomioka Giyu

[A Demon Slayer watch-along fic, not canon. An old story, but I still want to write it, so I'm moving it here.] Watching [Infinite-Flow Tabletop RPG / Demon Slayer] Mostly an ensemble cast, with Tomioka Giyu, Agatsuma Zenitsu, and Kaigaku as the main characters Watch-along story I actually just want to watch six critical failures happen~