Apparently, Disillusioned Adventurers Will Save the World, Vol. 2 (Light Novel): The Lovely Paladin

Thanks to their similiar experiences of betrayal, Nick, Tiana, Zem, and Karan have formed their own adventurer's party called Survivors to turn their lives around and--most importantly--finance their hobbies. Things are going well, as they have obtained a holy sword with multiple powers that can take on a human form! But then Nick bumps into his ex-girlfriend and is dragged into a duel with her adventurer's party, the Iron Tiger Troop, whose members are all fraudsters. Will the Survivors be able to defeat them and expose their crimes?