Other names:
ニコラのおゆるり魔界紀行 (Japanese); Nikola no O-yururi Makai Kikou; Nicola no Oyururi Makai Kikou; Nikora no Oyururi Makai Kikou; Nicola's Leisurely Demon World Travelogue (English)
Nicola, human, ends up in the Demon World where she is found by wandering trader, Simon. Unfortunately, humans don't seem to be appreciated all that much in the Demon World, but that doesn't stop Nicola from running her mouth all the time.