A slice-of-life spin-off set in Tempest, the monster nation Rimuru built. Follows Myulan and the daily lives of monsters, adventurers and citizens inside the kingdom between the major story events. Lighter in tone than the main series. Illustrated by Sho Okagiri. Japanese manga. Complete.

Read That Time I Got Reincarnated as a Slime: The Ways of the Monster Nation manga in English, fully completed. Also known as: 転生したらスライムだった件～魔物の国の歩き方～ · Tensei Shitara Slime Datta Ken: Mamono no Kuni no Arukikata · TenSura: The Walking Guide of the Monster Nation