T&T Adventures Japan (Free RPG Day 2018 Version)

From the cover: Everything you need to play! Includes rules, manga comic, and a solitaire adventure. User summary: Front page notes "Special Free Game Day edition of T&T Adventures Japan: Manga is entitled "Adventures in Tunnels With Trolls" Includes "Tunnels & Trolls Mini-Rules" Includes the solo adventure "Coming Down the Mountain: A Mystic Japanese T&T Adventure" (a "choose-your-own-adventure" style scenario).