Apparently, Disillusioned Adventurers Will Save the World, manga, vol 1-6

Veteran adventurer Nick works his hardest to progress his party to full rank as his ultimate dream. He is, however, unceremoniously expelled from the party due to disapproval, phony romance, and embezzlement. The directionless Nick spends his funds on merchandise and becomes an idol otaku to make ends meet. As luck would have it, three depressed individuals sat down at his table together drinking as a means of coping, when they all divulged their utter stories. Each of the four has one common thread: betrayal. Nick, mage Tiana, cleric Zem, and half-dragon Curran agree to form an unbreakable team to save humanity from corruption. These are listed as Mature, but mainly for the battles and a few implied situations -- fairly tame honestly.

Including all six volumes here, purchased new and read only by me. The books are in excellent shape and the story and art is really great. They will come as shown in the photos - please take a look and let me know if you have any questions. Thanks!