Apparently, Disillusioned Adventurers Will Save the World, Vol 1 (light novel) by Shinta Fuji

Nick used to be a member of a veteran adventurer party, helping hisundisciplinedfriends with the accounts whenever he could. But what was hisreward? Gettingaccused of embezzlement and kicked out by the leader herespected. Before long, hefinds a few other jaded adventurers and kindredspirits, and together, they form theirown unstoppable party!
Binding: Paperback / softback