Tsuihou Sarenakatta Otoko ~Nidome no Jinsei wa Dogeza kara Hajimarimashita~

Synopsis:

By some strange twist of fate, Cross Vish, a common peasant, found himself a member of the hero's party. Cross, a regular guy with no extraordinary abilities. For some reason, though, the heroes actually thought of Cross as a loyal buddy. He would never be expelled from the party, no matter what. And for that very reason, Cross continued to suffer. How could a worthless individual like him add anything to the hero's celebration? Then... Cross realized what his duty was. And just as the dying Demon King was about to use magic on the hero....