I found the PDF file years ago, you can type the name below in the search bar and look for the PDF file it's well hidden so it might take you a few tries: 「Omae Gotoki ga Maou ni Kateru to Omou na」 to Yuusha Party wo Tsuihou Sareta no de, Outo de Kimama ni Kurashitai
Read the light novels already, I don't know why the 5th Vol is taking so long. It's been almost 3 years! I'm so invested in the overall story.